Female infertility
Search date October 2009
Siladitya Bhattacharya, Neil Johnson, Hammed Akanji Tijani, Roger James Hart, Shilpi Pandey, and Ahmed Fathy
Gibreel
INTERVENTIONS
OVULATION DISORDERS: TREATMENT
Likely to be beneficial
Clomifene in ovulation disorders
In vitro fertilisation in ovulation disorders*
Laparoscopic ovarian drilling in ovulation disorders
Intrauterine insemination plus gonadotrophins for infertility associated with endometriosis
Laparoscopic ablation of endometrial deposits/Laparoscopic treatment of endometrioma
Tubal flushing for infertility associated with mild endometriosis New
Metformin in ovulation disorders
Likely to be ineffective or harmful
Trade off between benefits and harms
Gonadotrophins in ovulation disorders
Unknown effectiveness
Gonadotrophin priming of oocytes before in vitro maturation in ovulation disorders
Gonadotrophin-releasing hormone agonists plus gonadotrophins in ovulation disorders
Gonadotrophin-releasing hormone antagonists in ovulation disorders
Drug-induced ovarian suppression (no benefit for women
with endometriosis trying to conceive)
UNEXPLAINED INFERTILITY: TREATMENT
Trade off between benefits and harms
Intrauterine insemination combined with gonadotrophins
or clomifene New
Unknown effectiveness
In vitro fertilisation and embryo transfer (IVF-ET) New
Intrauterine insemination (IUI) alone, or combined with
gonadotrophins or clomifene in ovulation disorders
Pulsatile gonadotrophin-releasing hormone in ovulation
disorders
Tamoxifen in ovulation disorders
Likely to be ineffective or harmful
Clomifene in unexplained fertility New
Intrauterine insemination without ovarian stimulation
New
TUBAL OBSTRUCTION: TREATMENT
Likely to be beneficial
Covered elsewhere in Clinical Evidence
In vitro fertilisation (IVF) in tubal obstruction*
See erectile dysfunction
Tubal flushing with oil soluble media in tubal infertility
See fibroids
See pelvic inflammatory disease
Tubal surgery before in vitro fertilisation (IVF) in tubal
infertility
Unknown effectiveness
Selective salpingography plus tubal catheterisation in
tubal infertility
Tubal flushing with water soluble media in tubal infertility
See varicocoele
See endometriosis
See polycystic ovary syndrome
Footnote
*No RCTs, but strong observational evidence that in
vitro fertilisation increases live birth rates.
ENDOMETRIOSIS: TREATMENT
Likely to be beneficial
In vitro fertilisation (IVF) in endometriosis*
Key points
• About 17% of couples in industrialised countries seek help for infertility, which may be caused by ovulatory failure,
tubal damage or endometriosis, or a low sperm count.
• In women with ovulatory disorders, clomifene and metformin increase ovulation and pregnancy rates. There is
some evidence that tamoxifen may have similar efficacy to clomifene, but we found no RCTs of sufficient quality
comparing tamoxifen with placebo, and it is rarely used nowadays.
© BMJ Publishing Group Ltd 2010. All rights reserved. . . . . . . . . . . . . . . . . . . . . . 1 . . . . . . . . . . . . . . . . . . . . . Clinical Evidence 2010;11:819
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Gonadotrophins may increase pregnancy rates but may increase ovarian hyperstimulation syndrome (OHSS)
and multiple pregnancy.
Laparoscopic ovarian drilling may be as effective as gonadotrophins.
We don't know whether pulsed gonadotrophin-releasing hormone (GnRH), or gonadotrophin priming of oocytes
before in vitro maturation increase pregnancy rates.
Consensus suggests that in vitro fertilisation may lead to pregnancy, but increases the risks of multiple pregnancy
unless single embryo replacement is practised.
We don't know whether GnRH agonists plus gonadotrophins increase pregnancy rates compared with gonadotrophins alone but the combination treatment may be associated with an increased risk of OHSS. We don't
know how effective GnRH antagonists are because we found few trials.
We don't know whether intrauterine insemination alone, or combined with gonadotrophins or clomifene is effective
for infertility caused by ovulation disorders.
• In women with tubal infertility, tubal flushing may increase pregnancy rates, with oil soluble media possibly more
effective than water soluble media; however, we found few trials solely in women with tubal infertility.
Tubal surgery before in vitro fertilisation may increase pregnancy rates compared with no treatment in women
with hydrosalpinges, but we don't know whether selective salpingography plus tubal catheterisation is beneficial.
Consensus suggests that in vitro fertilisation is beneficial.
• In women with endometriosis, adding gonadotrophins to intrauterine insemination increases live birth rates compared
with no treatment and increases pregnancy rates compared with intrauterine insemination alone.
Laparoscopic ablation of endometrial deposits may increase live birth rates compared with diagnostic laparoscopy.
Drugs to induce ovarian suppression may not increase pregnancy rates.
Consensus suggests that in vitro fertilisation may be beneficial.
Tubal flushing with oil-based media may increase live birth rates and pregnancy rates in women with minimal or
mild endometriosis.
• In women with unexplained infertility, clomifene does not increase live birth rates. It is not better than expectant
management.
Intrauterine insemination without ovarian stimulation does not result in a significant increase in live birth rates.
Intrauterine insemination plus controlled ovarian stimulation may increase pregnancy rates but may increase
OHSS and multiple pregnancy.
In vitro fertilisation may be beneficial, however, evidence is insufficient to make any conclusions.
QUESTION
What are the effects of treatments for infertility caused by ovulation disorders?
OPTION
CLOMIFENE (CLOMIPHENE) FOR INFERTILITY CAUSED BY OVULATION DISORDERS. . . .
Live birth rate
Compared with tamoxifen Clomifene seems as effective as tamoxifen at increasing live birth rates in anovulatory
women (moderate-quality evidence).
Compared with laparoscopic ovarian drilling (LOD) We don't know whether initial treatment with clomifene or LOD
is more effective at increasing live birth rates in anovulatory women (low-quality evidence).
Compared with metformin Clomifene and metformin seem equally effective at increasing live birth rates in women
with polycystic ovary syndrome (PCOS) (moderate-quality evidence).
Metformin plus clomifene compared with clomifene alone Metformin plus clomifene is no more effective than clomifene
alone at increasing live birth rates in women with polycystic ovary disease (high-quality evidence).
Pregnancy rate
Compared with placebo Clomifene is more effective at increasing pregnancy rates in anovulatory women or women
with amenorrhoea and no other cause of infertility (high-quality evidence).
Compared with tamoxifen Clomifene seems as effective as tamoxifen at increasing pregnancy rates in anovulatory
women (moderate-quality evidence).
Compared with LOD We don't know whether initial treatment with clomifene or LOD is more effective at increasing
pregnancy rates in anovulatory women (low-quality evidence).
Compared with metformin We don't know how effective clomifene and metformin are compared with each other at
increasing pregnancy rates in women with PCOS (low-quality evidence).
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Metformin plus clomifene compared with clomifene alone We don't know whether metformin plus clomifene is more
effective than clomifene alone at increasing pregnancy rates in women with polycystic ovary disease (low-quality
evidence).
Compared with pulsatile gonadotrophin-releasing hormone (GnRH) We don't know how effective pulsatile GnRH
plus GnRH agonist and clomifene are compared with each other at increasing pregnancy rates in women with PCOS
(low-quality evidence).
Ovulation rate
Compared with placebo Clomifene is more effective at increasing ovulation rates in anovulatory women or women
with amenorrhoea and no other cause of infertility (high-quality evidence).
Compared with tamoxifen Clomifene seems as effective as tamoxifen at increasing ovulation rates in anovulatory
women (moderate-quality evidence).
Compared with LOD We don't know whether clomifene or LOD is more effective at increasing ovulation rates in
anovulatory women (moderate-quality evidence).
Compared with metformin We don't know how effective clomifene and metformin are compared with each other at
increasing ovulation rates in women with PCOS (low-quality evidence).
Metformin plus clomifene compared with clomifene alone We don't know whether metformin plus clomifene is more
effective than clomifene alone at increasing ovulation rates in women with polycystic ovary disease (low-quality evidence).
Compared with pulsatile GnRH We don't know how effective pulsatile GnRH plus GnRH agonist and clomifene are
compared with each other at increasing ovulation rates in women with PCOS (low-quality evidence).
Note
Clomifene has been associated with increased risks of multiple pregnancy.
For GRADE evaluation of interventions for female infertility, see table.
Benefits:
Clomifene versus placebo:
We found one systematic review (search date 2009, 3 crossover RCTs, 133 women described as
anovulatory or with amenorrhoea, and no other cause of infertility) comparing clomifene citrate
[12]
versus placebo.
The review found that clomifene (fixed dose 50 mg — variable dose up to 250 mg depending on
ovulatory response; 1–5 cycles) significantly increased pregnancy rates compared with placebo
(3 RCTs, post-crossover pregnancy rate: 14/70 [20%] with clomifene v 2/63 [3%] with placebo; OR
5.77, 95% CI 1.55 to 21.48). It also found that clomifene significantly increased ovulation rates (per
woman) compared with placebo (3 RCTs, post-crossover ovulation rate: 45/70 [64%] with clomifene
[12]
v 14/63 [22%] with placebo; fixed OR 7.47, 95% CI 3.24 to 17.23).
No studies were found with
the outcome of live birth rate.
Clomifene versus tamoxifen:
[12]
We found one systematic review (search date 2009, 2 RCTs, 190 anovulatory women)
and
[13]
comparing clomifene citrate versus tamoxifen.
one additional RCT
The review found no significant difference between clomifene and tamoxifen in rates of pregnancy
or ovulation (pregnancy rate per woman: 2 RCTs: 18/97 [18.6%] with clomifene v 18/93 [19.4%]
with tamoxifen; OR 0.94, 95% CI 0.46 to 1.94; ovulation rate per woman: 1 RCT: 30/47 [64%] with
[12]
clomifene v 26/48 [54%] with tamoxifen; OR 1.49, 95% CI 0.66 to 3.40).
It found no significant
difference between the treatment modalities in live birth rates (1 RCT: 1/47 [2%] with clomifene v
[12]
3/48 [6%] with tamoxifen; OR 0.33, 95% CI 0.03 to 3.25).
The additional RCT (66 anovulatory women) found similar pregnancy rates with both treatments
[13]
at 9 months (pregnancy rate: 80% in both groups; P value not reported).
Clomifene versus clomifene plus tamoxifen:
See benefits of tamoxifen.
Clomifene versus metformin:
See benefits of metformin.
Clomifene versus clomifene plus metformin:
See benefits of metformin.
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Clomifene versus urinary human chorionic gonadotrophin (hCG) plus clomifene:
See benefits of gonadotrophins.
Clomifene versus pulsatile gonadotrophin-releasing hormone (GnRH):
See benefits of pulsatile gonadotrophin-releasing hormone.
Clomifene versus laparoscopic ovarian drilling (LOD):
We found one unblinded RCT (72 anovulatory women with polycystic ovary syndrome [PCOS])
[14]
comparing laparoscopic ovarian drilling (LOD) with clomifene citrate.
It found no significant
difference between groups in the ovulation rate per person after initial treatment (24/32 [76%] with
clomifene v 21/33 [64%] with LOD; P = 0.32). Several women from both groups subsequently received the other treatment (22/33 [67%] women who had LOD subsequently received clomifene;
11/32 [34%] women who had clomifene subsequently received LOD) because of persistence of
anovulation, recurrence of anovulation, failure to conceive, or complications. The RCT found no
significant difference in the proportion of pregnancies or live births within 12 months between initial
treatment with clomifene and initial treatment with LOD; however, this proportion was higher with
initial treatment with clomifene (pregnancy: 14/32 [44%] with clomifene v 9/33 [27%] with LOD; OR
[14]
2.1, 95% CI 0.7 to 5.8; P = 0.13; intention to treat analysis).
Harms:
Clomifene has been associated with the well-recognised adverse effects of hot flushes, headaches,
[15]
For information from observational studies and guidelines on multiple
and visual complaints.
pregnancy, OHSS, and breast and ovarian cancer, please see comment below.
Clomifene versus placebo:
[12]
The systematic review was unable to derive information on adverse effects.
Clomifene versus tamoxifen:
The systematic review was unable to provide information on the adverse effects derived from the
[12]
[13]
The additional RCT gave no information on adverse effects.
included studies.
Clomifene versus clomifene plus tamoxifen:
See harms of tamoxifen.
Clomifene versus metformin:
See harms of metformin.
Clomifene versus clomifene plus metformin:
See harms of metformin.
Clomifene versus urinary hCG plus clomifene:
See harms of gonadotrophins.
Clomifene versus pulsatile GnRH:
See harms of pulsatile gonadotrophin-releasing hormone.
Clomifene versus LOD:
The RCT found one case of moderate ovarian hyperstimulation syndrome (OHSS), and one case
[14]
of significant depression with clomifene, and one case of left-sided pelvic pain after LOD.
Comment:
Multiple pregnancy: The multiple pregnancy rate in women undergoing clomifene treatment has
been estimated at less than 10% of women. It is imperative that women undergoing clomifene
[15]
treatment are monitored for the risk of a multiple pregnancy.
Ovarian hyperstimulation syndrome: Clomifene tends to cause only mild ovarian hyperstimulation
[15]
that does not require treatment. Severe OHSS is very rare after clomifene treatment.
Breast and ovarian cancer: One systematic review (search date 2008, 3 cohort studies [179,534
women], 1 case-control series [4682 controls, 4575 cases]) found that the use of clomifene or gonadotrophins was not associated with a significantly increased risk of breast cancer, especially
when compared with other infertile controls and adjusted for other potential confounders such as
[16]
age at follow-up and family history.
With regard to ovarian cancers, several case-control studies
published in the 1990s reported a significant increase in the risk of ovarian cancer in women receiving ovulation-stimulating drugs; however, the use of ovulation-stimulating drugs does not seem to
increase the risk above baseline levels in this population. However, one non-systematic review
and meta-analysis of case-control studies (8 studies, 5207 cases, 7705 controls) found an association between fertility drug use and borderline serous tumours in nulliparous women (OR 2.43,
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[17]
95% CI 1.01 to 5.88).
As with breast cancer, increasing risk with increased duration of treatment
[16]
cannot be ruled out with confidence.
Clinical guide:
Guidelines from the European Society of Reproduction and Embryology (ESHRE) and the American
[15]
[18]
Society of Reproductive Medicine (ASRM)
and the ASRM guideline
on the use of clomifene
citrate state that first-line treatment for an ovulatory woman with PCOS after appropriate peri-conceptual counselling and lifestyle advice is the commencement of ovulation induction with appropriate
[15] [18]
However, the selection of patients for clomifene citrate
monitoring with clomifene citrate.
treatment should take account of body weight, female age, and the presence of other infertility
factors. It is recommended that the starting dose of clomifene should be 50 mg/day (for 5 days)
with a maximum dose of 150 mg/day. A conception rate of up to 22% per cycle is expected in
women who respond to clomifene.
OPTION
TAMOXIFEN FOR INFERTILITY CAUSED BY OVULATION DISORDERS. . . . . . . . . . . . . . . . .
Live birth rate
Compared with clomifene Tamoxifen seems as effective as clomifene at increasing live birth rates in anovulatory
women (moderate-quality evidence).
Pregnancy rate
Compared with clomifene Tamoxifen seems as effective as clomifene at increasing pregnancy rates in anovulatory
women (moderate-quality evidence).
Ovulation rate
Compared with clomifene Tamoxifen seems as effective as clomifene at increasing ovulation rates in anovulatory
women (moderate-quality evidence).
Note
We found no direct information from RCTs about whether tamoxifen is better than no active treatment in women with
infertility. However, tamoxifen is rarely used in current clinical practice.
For GRADE evaluation of interventions for female infertility, see table.
Benefits:
Tamoxifen versus placebo:
We found no systematic review or RCTs.
Tamoxifen versus clomifene (clomiphene):
See benefits of clomifene.
Tamoxifen plus clomifene versus clomifene:
[12]
We found one systematic review (search date 2009),
which found no RCTs meeting Clinical
[22]
Evidence inclusion criteria. It found one small unblinded RCT (see comment).
Harms:
Tamoxifen versus placebo:
We found no systematic review to provide information as to the long-term risk of ovarian cancer
treated with tamoxifen for ovulation induction. For further information on general harms of tamoxifen
see harms of tamoxifen in reviews on Breast cancer (metastatic) and Breast cancer (nonmetastatic).
Tamoxifen versus clomifene:
See harms of clomifene.
Tamoxifen plus clomifene versus clomifene:
We found no RCTs meeting Clinical Evidence inclusion criteria (see comment).
Comment:
Tamoxifen plus clomifene versus clomifene:
The small unblinded RCT (20 anovulatory women) compared clomifene (100 mg during cycle days
5–9 for 3 consecutive treatment cycles) versus clomifene plus tamoxifen (clomifene 50 mg plus
tamoxifen 20 mg during cycle days 5–9 for 3 consecutive treatment cycles). It found no significant
difference between groups in the pre-crossover ovulation rate per woman at the end of three
treatment cycles; however, this was greater with clomifene plus tamoxifen. It found that all pregnancies were normal and single, and no severe complications were associated with either of the
[22]
treatments.
Clinical guide:
Tamoxifen is rarely used in current clinical practice.
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OPTION
METFORMIN FOR INFERTILITY CAUSED BY OVULATION DISORDERS. . . . . . . . . . . . . . . . .
Live birth rate
Metformin compared with placebo We don't know how metformin and placebo/no treatment compare for increasing
live birth rates in women with polycystic ovary syndrome (PCOS) (low-quality evidence).
Metformin compared with clomifene Metformin and clomifene seem equally effective at increasing live birth rates in
women with PCOS (moderate-quality evidence).
Metformin plus clomifene compared with clomifene alone Metformin plus clomifene is no more effective than clomifene
alone at increasing live birth rates in women with polycystic ovary disease (high-quality evidence).
Metformin plus in vitro fertilisation (IVF) compared with IVF alone Adding metformin to IVF or intracytoplasmic sperm
injection (ICSI) seems no more effective than IVF or ICSI alone at increasing live birth rates (moderate-quality evidence).
Metformin compared with laparoscopic ovarian drilling (LOD) Metformin seems more effective than LOD at increasing
live birth rates in women with clomifene-resistant PCOS (moderate-quality evidence).
Metformin added to LOD compared with LOD alone We don't know whether LOD followed by metformin or LOD
alone is more effective in increasing live birth rates (low-quality evidence).
Metformin plus gonadotrophins compared with gonadotrophins alone We don't know whether gonadotrophins plus
metformin are more effective than gonadotrophins alone at increasing live birth rate (moderate-quality evidence).
Pregnancy rate
Metformin compared with placebo Metformin is more effective than placebo at increasing pregnancy rates in women
with PCOS (high-quality evidence).
Metformin compared with clomifene We don't know how effective metformin and clomifene are compared with each
other at increasing pregnancy rates in women with PCOS (low-quality evidence).
Metformin plus clomifene compared with clomifene alone We don't know whether metformin plus clomifene is more
effective than clomifene alone at increasing pregnancy rates in women with polycystic ovary disease (low-quality
evidence).
Metformin plus IVF compared with IVF alone We don't know whether adding metformin to IVF/ICSI is more effective
at increasing pregnancy rates (low-quality evidence).
Metformin compared with LOD We don't know whether metformin or LOD is more effective at increasing pregnancy
rates in women with clomifene-resistant PCOS (low-quality evidence).
Metformin added to LOD compared with LOD alone We don't know whether LOD followed by metformin or LOD
alone is more effective in increasing pregnancy rates (low-quality evidence).
Metformin plus gonadotrophins compared with gonadotrophins alone Gonadotrophins plus metformin may be more
effective than gonadotrophins alone at increasing pregnancy rate (low-quality evidence).
Ovulation rate
Metformin compared with placebo Metformin is more effective than placebo at increasing ovulation rates in women
with PCOS (high-quality evidence).
Metformin compared with clomifene We don't know how effective metformin and clomifene are compared with each
other at increasing ovulation rates in women with PCOS (low-quality evidence).
Metformin plus clomifene compared with clomifene alone We don't know whether metformin plus clomifene is more
effective than clomifene alone at increasing ovulation rates in women with polycystic ovary disease (low-quality evidence).
Metformin compared with LOD We don't know whether LOD or metformin is more effective at increasing ovulation
rates in women with clomifene-resistant PCOS (very low-quality evidence).
For GRADE evaluation of interventions for female infertility, see table.
Benefits:
Metformin versus placebo:
We found one systematic review (search date 2008, 16 RCTs) examining the use of metformin in
[19]
It found that metformin significantly increased
women with polycystic ovary syndrome (PCOS).
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ovulation rate compared with placebo (13 RCTs: 132/445 [30%] with metformin v 81/430 [19%]
with placebo; OR 2.12, 95% CI 1.50 to 3.00). It also found that metformin significantly increased
pregnancy rate compared with placebo (6 RCTs: 56/239 [23%] with metformin v 18/240 [8%] with
placebo; OR 3.86, 95% CI 2.18 to 6.84). The review found no significant difference between
women treated with metformin or placebo in live birth rate (2 RCTs: 2/25 [8%] with metformin v
[19]
2/25 [8%] with placebo; OR 1.00, 95% CI 0.16 to 6.39).
Metformin versus clomifene:
We found two systematic reviews (search dates 2008) comparing metformin or clomifene citrate
[19] [20]
as first-line treatment in women with PCOS.
The systematic reviews identified the same
three RCTs (850 women), however, they performed different meta-analyses, and so we have re[19] [20]
ported both here.
The first review (3 RCTs [all of which were identified by the second review]) found that clomifene
significantly increased ovulation rate and pregnancy rate compared with metformin (3 RCTs: ovulation rate/cycle: 429/1266 [34%] with metformin v 617/1204 [51%] with clomifene; OR 0.48, 95%
CI 0.41 to 0.57; pregnancy rate: 60/300 [20%] with metformin v 85/300 [28%] with clomifene; OR
0.63, 95% CI 0.43 to 0.92). It found no significant difference between metformin or clomifene for
live birth rate (3 RCTs: 45/300 [15%] with metformin v 63/300 [21%] with clomifene; OR 0.67, 95%
[19]
CI 0.44 to 1.02).
However, the review found significant statistical heterogeneity (P <0.01) in
these analyses. Subgroup analysis according to women's BMI found that clomifene significantly
increased live birth rate compared with metformin in obese women (BMI >30), however, it found
that metformin significantly increased live birth rate compared with clomifene in non-obese women
(BMI <30) (women with BMI >30: 2 RCTs: 19/250 [8%] with metformin v 54/250 [22%] with clomifene;
OR 0.30, 95% CI 0.17 to 0.52; women with BMI <30: 1 RCT: 26/50 [52%] with metformin v 9/50
[19]
[18%] with clomifene; OR 4.94, 95% CI 1.99 to 12.26).
The second review (3 RCTs [all of which were identified by the first review]) found no significant
difference between groups for any outcome (ovulation rate/woman: 166/296 [56%] with metformin
v 211/298 [71%] with clomifene; OR [clomifene v metformin] 1.55, 95% CI 0.40 to 5.99; clinical
pregnancy rate: 59/296 [20%] with metformin v 84/298 [28%] with clomifene; OR [clomifene v
metformin] 1.22, 95% CI 0.23 to 6.55; live birth rate: 44/296 [15%] with metformin v 62/298 [21%]
[20]
The authors of this review
with clomifene; OR [clomifene v metformin] 1.17, 95% CI 0.16 to 8.61).
commented that metformin takes longer than clomifene to work as it is altering the woman’s
[20]
metabolism rather than directly stimulating ovulation.
As a result, the number of women that
ovulated is not different between the two reviews but the number of ovulatory cycles will be greater
in the clomifene groups, hence explaining the apparent different results for ovulation rate between
the reviews. However, the review found significant statistical heterogeneity (P <0.0001) in these
analyses. It commented that differences in inclusion criteria and definition of PCOS in the RCTs,
differences in BMI of women, and previous treatment history may have contributed to this heterogeneity.
Metformin plus clomifene versus clomifene alone:
We found two systematic reviews (search dates 2008) comparing clomifene plus metformin versus
clomifene alone in women with PCOS, many of whom had not responded to previous treatment
[19] [20]
The systematic reviews identified three RCTs (720 people) in common,
with clomifene.
however, they applied different inclusion criteria, and reached different conclusions, so we have
[21]
reported both here. We found one subsequent small RCT.
The first systematic review (11 RCTs [3 RCTs also identified by the second review], 2668 people)
[19]
found that metformin plus ovulation induction agent (clomifene in all studies, one study additionally used human chorionic gonadotrophin) significantly improved ovulation rate compared with
clomifene alone (11 RCTs: 830/1329 [70%] with metformin plus clomifene v 654/1339 [49%] with
clomifene alone; OR 1.76, 95% CI 1.51 to 2.06). However, the review found significant statistical
heterogeneity (P = 0.00003) in this analysis, which was not affected by stratification according to
obesity. The review commented that it may have been caused by differences in clomifene sensitivity among study participants. The review found that metformin plus clomifene significantly improved
clinical pregnancy rate compared with clomifene alone (8 RCTs: 182/486 [37%] with metformin
plus clomifene v 144/490 [29%] with clomifene alone; OR 1.48, 95% CI 1.12 to 1.95). However, it
found significant statistical heterogeneity (P = 0.0058) in this analysis. Subgroup analysis according
to women's BMI found that metformin plus clomifene significantly increased clinical pregnancy
rates compared with clomifene alone in obese women (BMI >30); however, it found no significant
difference in the subgroup of women with BMI <30 (women with BMI >30: 5 RCTs: 110/319 [34%]
with metformin plus clomifene v 78/324 [24%] with clomifene alone; OR 1.67, 95% CI 1.18 to 2.36;
women with BMI <30: 3 RCTs: 72/167 [43%] with metformin plus clomifene v 66/166 [40%] with
clomifene alone; OR 1.19, 95% CI 0.74 to 1.90) suggesting that the benefit of combination treatment
may lie in the subgroup of obese women. The review found no significant difference between
7
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Women's health
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groups in live birth rate (4 RCTs: 88/373 [24%] with metformin plus clomifene v 86/379 [23%] with
clomifene alone; OR 1.05, 95% CI 0.75 to 1.47). It also found no significant difference in live birth
rates in the subgroup of obese women (3 RCTs: 67/262 [26%] with metformin plus clomifene v
[19]
55/265 [21%] with clomifene alone; OR 1.31, 95% CI 0.87 to 1.96).
The second systematic review (3 RCTs [all of which were also identified by the first review], 720
people) found no significant difference between clomifene plus metformin versus clomifene alone
for ovulation rate, pregnancy rate, and live birth rate, after six cycles (followed by 9-month extension
to evaluate live birth in one RCT) (ovulation rate: 262/362 [72%] with clomifene alone v 271/358
[76%] with clomifene plus metformin; OR 0.84, 95% CI 0.60 to 1.18; pregnancy rate: 120/362 [33%]
with clomifene alone v 132/358 [37%] with clomifene plus metformin; OR 0.85, 95% CI 0.62 to
1.15; live birth rate: 120/362 [33%] with clomifene alone v 132/358 [37%] with clomifene plus met[20]
formin; OR 0.99, 95% CI 0.70 to 1.40).
The subsequent RCT (32 women with PCOS, mean BMI about 28) found no significant difference
between clomifene plus metformin and clomifene plus placebo in ovulation rate after one to three
cycles (10/16 [63%] with clomifene plus metformin v 6/16 [38%] with clomifene plus placebo;
[21]
However, the results of this study should be interpreted with caution, because of
P = 0.1572).
its small size, uncertainty about blinding in the study, and the method of randomisation was also
not reported.
Metformin versus laparoscopic ovarian drilling (LOD):
See benefits of laparoscopic ovarian drilling.
Metformin plus gonadotrophins versus LOD:
See benefits of gonadotrophins.
Metformin plus gonadotrophins compared with gonadotrophins alone:
See benefits of gonadotrophins.
Metformin plus in vitro fertilisation (IVF) versus IVF alone:
See benefits of IVF (ovulation disorders).
Harms:
Metformin versus placebo:
The review found no significant difference between groups in miscarriage rate (4/40 [10%] with
[19]
The review found that
metformin v 3/11 [27%] with placebo; OR 0.30, 95% CI 0.06 to 1.59).
metformin significantly increased gastrointestinal disturbance, other than nausea and vomiting,
compared with placebo (48/125 [38%] with metformin v 7/128 [5%] with placebo; OR 9.23, 95%
[19]
CI 4.18 to 20.37).
Metformin versus clomifene:
The first review found no significant difference between groups in miscarriage rate (13/60 [22%]
[19]
The review is
with metformin v 22/85 [26%] with clomifene; OR 0.94, 95% CI 0.42 to 2.07).
likely to have been underpowered to detect a clinically important difference in these outcomes because of low event rates in the RCTs identified.
The second review found no significant difference between groups for miscarriage rate/cycle
started (13/296 [4%] with metformin v 20/298 [7%] with clomifene; OR [clomifene v metformin]
1.58, 95% CI 0.77 to 3.25) and with no significant difference in continuation rates for adverse events
(7/296 [2.4%] with metformin v 5/298 [1.7%] with clomifene; OR [clomifene v metformin] 0.7, 95%
[20]
CI 0.22 to 2.25).
Metformin plus clomifene versus clomifene alone:
The first systematic review found no significant difference between groups in miscarriage rate or
multiple pregnancy rate (miscarriage rate: 5 RCTs: 42/374 [11%] with clomifene plus metformin v
28/371 [8%] with clomifene alone; OR 1.48, 95% CI 0.90 to 2.43; multiple pregnancy rate: 4 RCTs:
3/334 [1%] with clomifene plus metformin v 6/331 [2%] with clomifene alone; OR 0.50, 95% CI 0.12
[19]
It found significantly greater incidence of nausea and vomiting with clomifene plus
to 2.02).
metformin compared with clomifene alone (1 RCT: 72/209 [34%] with clomifene plus metformin v
[19]
28/209 [13%] with clomifene alone; OR 3.40, 95% CI 2.08 to 5.54).
The second systematic review found no significant difference between metformin plus clomifene
versus clomifene alone for miscarriage rate after six cycles (miscarriage rate: 26/362 [7%] with
[20]
clomifene alone v 34/358 [9%] with clomifene plus metformin; OR 0.74, 95% CI 0.43 to 1.26).
The subsequent RCT reported that almost all women treated with metformin reported gastrointestinal
adverse effects, however, none of these women withdrew from the study (absolute numbers and
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8
Women's health
Female infertility
statistical comparison between groups not reported). It found that one woman treated with clomifene
plus metformin for three cycles was at high risk of ovarian hyperstimulation syndrome (OHSS),
and treatment was discontinued.
Metformin versus LOD:
See harms of LOD.
Metformin plus gonadotrophins versus LOD:
See harms of gonadotrophins.
Metformin plus gonadotrophins compared with gonadotrophins alone:
See harms of gonadotrophins.
Metformin plus IVF versus IVF alone:
See harms of IVF (ovulation disorders).
Comment:
Metformin versus placebo:
None of the RCTs identified by the review assessed live birth rate or clinical pregnancy rate as a
[19]
primary outcome measure for this comparison.
Metformin plus clomifene versus clomifene alone:
Gastrointestinal symptoms are greater in women receiving metformin therapy. Any favourable effect
of the combination therapy may potentially lie within the subgroup of women with a BMI >30, although
there was ultimately no significant benefit with respect to live birth rates, and these women would
[19] [20]
be better advised to undergo lifestyle changes before fertility treatment.
OPTION
GONADOTROPHINS FOR INFERTILITY CAUSED BY OVULATION DISORDERS. . . . . . . . . . .
Live birth rate
Gonadotrophins plus metformin compared with gonadotrophins alone We don't know whether gonadotrophins plus
metformin are more effective than gonadotrophins alone at increasing live birth rate (moderate-quality evidence).
Compared with laparoscopic ovarian drilling (LOD) Gonadotrophins seem equally effective as LOD (with or without
medical ovulation) at increasing live birth rates at 6 to 12 months in women with clomifene-resistant polycystic ovary
syndrome (PCOS) (moderate-quality evidence).
Urinary human chorionic gonadotrophin (hCG) plus clomifene citrate versus clomifene citrate alone We don't know
whether administering urinary hCG is more effective than no hCG at increasing live birth rate in anovulatory women
being treated with clomifene (low-quality evidence).
Pregnancy rate
Urinary follicle-stimulating hormone (urofollitropin) compared with human menopausal gonadotrophin (hMG) We
don't know whether urinary FSH or hMG are more effective at improving pregnancy rate in clomifene-resistant
women with PCOS (low-quality evidence).
Gonadotrophins plus metformin compared with gonadotrophins alone Gonadotrophins plus metformin may be more
effective than gonadotrophins alone at increasing pregnancy rate (low-quality evidence).
Compared with LOD Gonadotrophins seem equally effective as LOD (with or without medical ovulation) at increasing
pregnancy rates at 6 to 12 months in women with clomifene-resistant PCOS (moderate-quality evidence).
Urinary human chorionic gonadotrophin (hCG) plus clomifene citrate versus clomifene citrate alone We don't know
whether administering urinary hCG is more effective than no hCG at increasing pregnancy rate in anovulatory
women being treated with clomifene (low-quality evidence).
Gonadotrophin-releasing hormone (GnRH) agonists plus gonadotrophins compared with gonadotrophins alone We
don't know whether GnRH plus gonadotrophins are more effective than gonadotrophins alone at increasing pregnancy
rates (low-quality evidence).
Ovulation rate
Urinary follicle-stimulating hormone (urofollitropin) compared with hMG We don't know whether urinary FSH or hMG
is more effective at increasing ovulation rate in clomifene-resistant women with PCOS (low-quality evidence).
Urinary hCG plus clomifene citrate versus clomifene citrate alone We don't know whether administering urinary hCG
is more effective than no hCG at increasing ovulation rate in anovulatory women being treated with clomifene (lowquality evidence).
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9
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GnRH agonists plus gonadotrophins compared with gonadotrophins alone We don't know whether GnRH agonists
plus gonadotrophins are more effective than gonadotrophins alone at increasing ovulation rates (very low-quality
evidence).
Compared with LOD Gonadotrophins seem equally effective as LOD at increasing ovulation rates at 6 months in
women with clomifene-resistant PCOS (moderate-quality evidence).
Adverse effects
Gonadotrophins may be associated with a slight increase in risk of epithelial ovarian cancer compared with controls.
Gonadotrophins have been associated with ovarian hyperstimulation syndrome and multiple pregnancies.
Note
We found no clinically important results from RCTs about the effects of gonadotrophins compared with no active
treatment or clomifene (clomiphene).
For GRADE evaluation of interventions for female infertility, see table.
Benefits:
Gonadotrophins versus placebo or clomifene (clomiphene):
We found no RCTs meeting Clinical Evidence reporting criteria.
Urinary follicle-stimulating hormone (urofollitropin) versus human menopausal gonadotrophin
(hMG):
We found one systematic review (search date not reported, 8 RCTs) comparing purified urinary
FSH versus hMG for ovulation induction in clomifene-resistant women with polycystic ovary syn[24]
drome (PCOS).
It found no significant difference between FSH or hMG with or without GnRH
agonist in ovulation rate or pregnancy rate (7 RCTs: ovulation rate: 216/312 [69%] with hMG v
232/315 [74%] with FSH; OR 0.75, 95% CI 0.52 to 1.07; pregnancy rate (per cycle): 31/312 [10%]
[24]
with hMG v 35/315 [11%] with FSH; OR 0.89, 95% CI 0.53 to 1.49).
The review commented
that none of the RCTs stated the method of randomisation, and only one RCT described blinding.
Gonadotrophins versus laparoscopic ovarian drilling:
See benefits of laparoscopic ovarian drilling.
Gonadotrophins plus metformin versus gonadotrophins alone:
[25]
[26]
We found two systematic reviews (search dates 2005
and 2007
). The reviews identified
RCTs in common; however, they applied different inclusion criteria and reported different analyses,
so we have reported both here.
The first systematic review (search date 2005, 3 RCTs [2 RCTs also included in second review, 1
RCT excluded by the second review due to not reporting pregnancy rates before the crossover],
84 clomifene-resistant women with PCOS) compared metformin plus gonadotrophin ovulation induction versus gonadotrophin ovulation induction alone or plus placebo. It found no significant difference between metformin plus gondatrophins and gonadotrophins alone in pregnancy rate;
however, this was higher with combined treatment (10/36 [28%] with metformin plus gonadotrophin
[25]
v 4/41 [10%] with gonadotrophin alone; OR 3.46, 95% CI 0.98 to 12.2; P = 0.05).
The second systematic review (search date 2007, 4 RCTs [2 RCTs also included in the first review])
compared metformin plus FSH versus FSH alone for ovulation induction using human chorionic
[26]
gonadotrophin (hCG) trigger.
It found that metformin plus FSH significantly improved pregnancy
rates compared with FSH alone (30/78 [38%] with metformin plus FSH v 17/76 [22%] with FSH
alone; RR 1.72, 95% CI 1.07 to 2.78). It found no significant difference in live birth rate between
metformin plus gonadotrophins and gonadotrophins alone; however, this was higher with metformin
plus gonadotrophins (3 RCTs: 22/62 [35%] with metformin plus FSH v 13/60 [22%] with FSH alone;
RR 1.64, 95% CI 0.95 to 2.85).
Urinary hCG plus clomifene citrate versus clomifene citrate alone:
We found one systematic review (search date 2007, 2 RCTs) comparing urinary hCG versus no
[27]
treatment in women being treated with clomifene citrate.
The objective of the review was to
determine the efficacy of administering an ovulation trigger compared with spontaneous ovulation
in anovulatory women being treated with ovulation-inducing agents.The review found no significant
difference between urinary hCG and no treatment in the primary outcome of live birth rate (26/155
[16.8%] with urinary hCG v 25/150 [16.7%] with no treatment; OR 0.98, 95% CI 0.52 to 1.83). It
also found no significant difference between groups in ovulation rate or clinical pregnancy rate
(ovulation rate: 133/155 [86%] with urinary hCG v 130/150 [87%] with no treatment; OR 0.95, 95%
CI 0.49 to 1.83; clinical pregnancy rate: 28/155 [18%] with urinary hCG v 26/150 [17%] with no
treatment; OR 1.02, 95% CI 0.56 to 1.88). The review reported that both RCTs were underpowered
to detect differences in live birth rate, and one RCT was underpowered to detect differences in
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10
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Female infertility
pregnancy rate and ovulation rate. One of the RCTs was single blinded, and the other RCT was
open-label.
Gonadotrophin-releasing hormone (GnRH) agonists plus gonadotrophins versus gonadotrophins alone:
See benefits of GnRH agonists plus gonadotrophins for infertility caused by ovulation disorders.
Harms:
Gonadotrophins versus placebo or clomifene:
We found no RCTs.
Urinary FSH (urofollitropin) versus hMG:
The review found a significantly higher rate of ovarian hyperstimulation syndrome (OHSS) with
FSH compared with hMG with or without GnRH agonist (6 RCTs: OHSS/cycle: 12/199 [6%] with
[24]
hMG v 27/197 [14%] with FSH; OR 0.33, 95% CI 0.16 to 0.65).
It found no significant difference
between FSH and hMG in miscarriage rate or multiple pregnancy rate (4 RCTs: miscarriage
rate/pregnancy: 7/22 [32%] with hMG v 10/25 [40%] with FSH; OR 0.85, 95% CI 0.24 to 2.96;
multiple pregnancy rate/pregnancy: 2/22 [9%] with hMG v 4/28 [11%] with FSH; OR 0.62 CI 0.11
[24]
to 3.58).
Gonadotrophins versus laparoscopic ovarian drilling:
See harms of laparoscopic ovarian drilling.
Gonadotrophins plus metformin versus gonadotrophins alone:
The first review found that none of the RCTs reported on the incidence of OHSS. It gave no further
[25]
information on adverse effects.
The second review found that combined treatment significantly reduced multiple pregnancies
compared with gonadotrophins alone (RR 0.26, 95% CI 0.07 to 0.96; absolute numbers not reported).
It found no significant difference between groups in OHSS (RR 0.59, 95% CI 0.17 to 2.1; absolute
numbers not reported). However, these results should be interpreted with caution because it is
[26]
likely that there were too few cases to assess the effect of treatments on incidence of OHSS.
Urinary hCG plus clomifene citrate versus clomifene citrate alone:
The review found no significant difference between groups in miscarriage rate (miscarriage rate:
[27]
3/28 [11%] with urinary hCG v 2/26 [8%] with no treatment; OR 1.18, 95% CI 0.18 to 7.66).
GnRH agonists plus gonadotrophins versus gonadotrophins alone:
See harms of GnRH agonists plus gonadotrophins for infertility caused by ovulation disorders.
Comment:
Clinical guide:
Despite not being placebo controlled, trials in the review of gonadotrophins provide evidence that
[24]
Follitropin is not derived from human tissues, as it is derived from recomtreatment is effective.
binant technology.
The guideline of the European Society of Reproduction and Embryology (ESHRE) consensus
statement on treatment of infertility related to PCOS provides the following summary points for
ovulation induction by gonadotrophins: 1) the recommended starting daily dose is 37.5 to 50 IU/day;
2) the starting period for stimulation should be at least 14 days for the first cycle as it is less likely
to result in excessive stimulation; 3) when increasing doses of FSH, small incremental steps of
50% are less likely to result in excessive stimulation; 4) up to six cycles of stimulated ovulation
should be performed; 5) it is essential to monitor the ovarian response; 6) cycle cancellation criteria
should be established before commencement of therapy; 7) preventing all multiple pregnancies
[15]
and OHSS is not possible at this time.
Evidence derived from the reviews analysed suggests a potential benefit of concurrent administration
of metformin with gonadotrophin ovulation induction at leading to monofollicular ovulation and reducing the number of multiple pregnancies in women with PCOS.
OPTION
GONADOTROPHIN-RELEASING HORMONE (GNRH) AGONISTS PLUS GONADOTROPHINS
FOR INFERTILITY CAUSED BY OVULATION DISORDERS. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pregnancy rate
Compared with gonadotrophins alone We don't know whether gonadotrophin-releasing hormone (GnRH) agonists
plus gonadotrophins are more effective than gonadotrophins alone at increasing pregnancy rates (low-quality evidence).
Ovulation rate
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Compared with gonadotrophins alone We don't know whether GnRH agonists plus gonadotrophins are more effective
than gonadotrophins alone at increasing ovulation rates (very low-quality evidence).
Note
Gonadotrophin agonists plus gonadotrophin combination treatments are associated with an increased risk of ovarian
hyperstimulation syndrome and multiple pregnancy. We found no clinically important results from RCTs about the
effects of GnRH agonists plus gonadotrophins compared with GnRH antagonists in women with ovulation disorders.
For GRADE evaluation of interventions for female infertility, see table.
Benefits:
Gonadotrophin-releasing hormone (GnRH) agonists plus gonadotrophins versus gonadotrophins alone:
We found one systematic review (search date not reported, 4 RCTs) comparing gonadotrophin
therapy with and without the concomitant use of GnRH agonist for ovulation induction in women
[24]
with PCOS.
It found no significant difference in ovulation rate or pregnancy rate between gonadotrophin alone or gonadotrophin plus GnRH agonist (3 RCTs: ovulation rate: 62/93 [67%] with
gonadotrophin plus GnRH agonist v 72/94 [77%] with gonadotrophin alone; OR 0.59, 95% CI 0.31
to 1.12; pregnancy rate 19/102 [19%] with gonadotrophin plus GnRH agonist v 15/109 [14%] with
[24]
The review commented that none of the
gonadotrophin alone; OR 1.43, 95% CI 0.67 to 3.04).
RCTs stated the method of randomisation or blinding.
Harms:
GnRH agonists plus gonadotrophins versus gonadotrophins alone:
The review found significantly higher rates of overstimulation per cycle with gonadotrophin plus
GnRH agonist compared with gonadotrophin alone (2 RCTs: 24/90 [27%] with gonadotrophin plus
GnRH agonist v 9/91 [10%] with gonadotrophin alone; OR 3.15, 95% CI 1.48 to 6.70). It found no
significant difference between groups in OHSS rate (3 RCTs: 9/93 [10%] with gonadotrophin plus
[24]
GnRH agonist v 7/94 [7%] with gonadotrophin alone; OR 1.41, 95% CI 0.50 to 3.95).
Comment:
Depot versus daily dose GnRH agonist:
We found one systematic review (search date 2004, 6 RCTs, 552 women) comparing depot GnRH
agonist versus daily GnRH agonist. It found no significant difference between depot and daily GnRH
agonist in clinical pregnancy rate per woman, ongoing pregnancy rate per cycle, multiple pregnancy
[29]
rate, miscarriage rate, or incidence of OHSS.
Clinical guide:
GnRH agonists plus gonadotrophin combination treatments are not widely used in ovulation induction
treatment for ovulatory disorders because they do not improve pregnancy rates, and are associated
[30]
[15]
The Thesaloniki consensus statement
commented that
with an increased risk of OHSS.
the use of concomitant GnRH agonist administration led to a significantly higher hyperstimulation
rate, and the associated risk of multiple pregnancies and the additional inconvenience and cost of
concomitant GnRH agonist administration, in the absence of documented increases in pregnancy
success, do not currently justify the routine use of GnRH agonists during ovulation induction with
gonadotrophins in women with PCOS. GnRH agonists are most often used in conjunction with
gonadotrophins to achieve pituitary downregulation and facilitate cycle control in ovarian stimulation
during in vitro fertilisation (IVF) treatment.
OPTION
GONADOTROPHIN-RELEASING HORMONE (GNRH) ANTAGONISTS FOR INFERTILITY
CAUSED BY OVULATION DISORDERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Live birth rate
Compared with gonadotrophin-releasing hormone (GnRH) agonists We don't know how GnRH antagonists or GnRH
agonists compare with each other at increasing live birth rates in women with polycystic ovary syndrome (PCOS)
(moderate-quality evidence).
Pregnancy rate
Compared with GnRH agonists We don't know how GnRH antagonists or GnRH agonists compare with each other
at increasing pregnancy rates in women with PCOS (low-quality evidence).
Note
We found no clinically important results from RCTs about the effects of GnRH antagonists compared with no active
treatment.
For GRADE evaluation of interventions for female infertility, see table.
Benefits:
Gonadotrophin-releasing hormone (GnRH) antagonists versus placebo:
We found no systematic review or RCTs in women with ovulatory disorders.
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GnRH antagonists versus GnRH agonists in an IVF cycle:
We found one systematic review (search date 2006, 4 RCTs [one of which was published in abstract
form], 305 women with PCOS) examining the use of GnRH antagonist for ovarian stimulation for
[31]
in vitro fertilisation (IVF).
All studies involved pretreatment with oral contraceptive pill, and used
the long agonist protocol. It found no significant difference between groups in pregnancy rate (4
RCTs: 56/151 [37%] with antagonist v 64/154 [42%] with agonist; OR 0.82, 95% CI 0.51 to 1.32;
P = 0.42). The review reported that the method of randomisation was not reported in two of the
included RCTs.
We found another systematic review (search date 2005), which identified two RCTs, which were
also identified by the first systematic review. However, this review reported on the outcome of live
birth rate. It found no significant difference between groups in live birth rate (37/100 [37%] with
[32]
antagonist v 41/104 [39%] with agonist; OR 0.90, 95% CI 0.51 to 1.58).
GnRH antagonists versus other treatments:
We found no systematic review or RCTs.
Harms:
GnRH antagonists versus placebo:
We found no RCTs.
GnRH antagonists versus GnRH agonists in an IVF cycle:
The first systematic review found that there were no cases of severe ovarian hyperstimulation
[31]
syndrome (OHSS).
It found no significant difference between groups in the incidence of OHSS
(grades 1 to 2) (2 RCTs: 5/100 [5%] with antagonist v 7/104 [7%] with agonist; OR 0.73, 95% CI
0.22 to 2.38). However, results should be interpreted with caution because the analysis may have
been underpowered because of the small number of cases. The review commented that in women
at risk of OHSS, GnRH-agonist triggering seems to be associated with a reduction in the incidence
[31]
of mild and moderate OHSS.
The second systematic review did not report on the incidence of OHSS in the subgroup of women
with PCOS. It found that in a general population, GnRH antagonist was associated with a significantly reduced incidence of OHSS requiring admission to hospital compared with GnRH agonist
[32]
(7 RCTs: OR 0.46, 95% CI 0.26 to 0.82; P = 0.01; absolute numbers not reported).
GnRH antagonists versus other treatments:
We found no RCTs.
Comment:
OPTION
Clinical guide:
Women with PCOS are at a substantial risk of OHSS in an IVF cycle. The systematic review sug[32]
in the general population,
gests that the use of an antagonist may reduce the incidence of OHSS
and potentially this treatment should be considered for women with PCOS.
LAPAROSCOPIC OVARIAN DRILLING (LOD) FOR INFERTILITY CAUSED BY OVULATION
DISORDERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Live birth rate
Compared with gonadotrophins Laparoscopic ovarian drilling (LOD) (with or without medical ovulation) seems
equally effective as gonadotrophins at increasing live birth rates at 6 to 12 months in women with clomifene-resistant
polycystic ovary syndrome (PCOS) (moderate-quality evidence).
Compared with metformin LOD seems less effective than metformin at increasing live birth rates in women with
clomifene-resistant PCOS (moderate-quality evidence).
LOD plus metformin compared with LOD alone We don't know whether LOD followed by metformin or LOD alone is
more effective at increasing live birth rates (low-quality evidence).
Compared with clomifene We don't know whether initial treatment with clomifene or LOD is more effective at increasing
live birth rates in anovulatory women (low-quality evidence).
Pregnancy rate
Compared with metformin We don't know whether LOD or metformin is more effective at increasing pregnancy rates
in women with clomifene-resistant PCOS (low-quality evidence).
Compared with gonadotrophins LOD (with or without medical ovulation) seems equally effective as gonadotrophins
at increasing pregnancy rates at 6 to 12 months in women with clomifene-resistant PCOS (moderate-quality evidence).
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LOD plus metformin compared with LOD alone We don't know whether LOD followed by metformin or LOD alone is
more effective at increasing pregnancy rates (low-quality evidence).
Compared with clomifene We don't know whether initial treatment with clomifene or LOD is more effective at increasing
pregnancy rates in anovulatory women (low-quality evidence).
Ovulation rate
Compared with clomifene We don't know whether clomifene or LOD is more effective at increasing ovulation rates
in anovulatory women (moderate-quality evidence).
Compared with metformin We don't know whether LOD or metformin is more effective at increasing ovulation rates
in women with clomifene-resistant PCOS (very low-quality evidence).
Compared with gonadotrophins LOD seems equally effective as gonadotrophins at increasing ovulation rates at 6
months in women with clomifene-resistant PCOS (moderate-quality evidence).
Note
LOD has been associated with lower risks of multiple pregnancy compared with gonadotrophins. We found no direct
information from RCTs about whether LOD is better than no active treatment.
For GRADE evaluation of interventions for female infertility, see table.
Benefits:
Laparoscopic ovarian drilling (LOD) versus no treatment:
We found no RCTs.
LOD versus gonadotrophins:
We found one systematic review (search date 2007, 5 RCTs), which compared LOD with or without
ovarian stimulation versus gonadotrophins alone in women with anovulatory clomifene (clomiphene)[28]
It found no significant difference in live birth rates between ovarian drilling and
resistant PCOS.
gonadotrophins (3 cycles) at 6 months' follow-up (1 RCT: 4/29 [14%] with ovarian drilling v 4/21
[19%] with gonadotrophins; OR 0.68, 95% CI 0.15 to 3.10). It also found no significant difference
in live birth rates after ovarian drilling with or without medical ovulation induction versus gonadotrophins (6 cycles) at 12 months' follow-up (1 RCT: 52/83 [63%] with ovarian drilling with or
without medical ovulation induction v 51/85 [60%] with gonadotrophins alone; OR 1.12, 95% CI
0.60 to 2.08). The review found no significant difference in pregnancy rates between LOD and
gonadotrophins (3 cycles) at 6 months' follow-up (1 RCT: 5/29 [17%] with LOD v 5/21 [24%] with
gonadotrophins; OR 0.67, 95% CI 0.17 to 2.68). It also found no significant difference between
ovarian drilling with or without medical ovulation and gonadotrophins (6 cycles) at 12 months' followup (3 RCTs: 75/128 [59%] with LOD v 71/126 [56%] with gonadotrophins; OR 1.15, 95% CI 0.69
[28]
to 1.93).
It found no significant difference in ovulation rate between LOD and gonadotrophins
(3 cycles) at 6 months' follow-up (1 RCT: 15/29 [52%] with LOD v 13/21 [62%] with gonadotrophins;
OR 0.66, 95% CI 0.21 to 2.07).
LOD versus metformin:
We found one systematic review (search date 2007), which identified one RCT comparing LOD
[26]
versus metformin in clomifene-resistant women with PCOS.
It found no significant difference
between groups in clinical pregnancy rate after six cycles of treatment (39/54 [72%] with metformin
v 31/55 [56%] with LOD; RR 1.28, 95% CI 0.96 to 1.7). It found that metformin significantly increased
live birth rate compared with LOD (32/54 [59%] with metformin v 20/55 [36%] with LOD; RR 1.63,
[26]
95% CI 1.08 to 2.46).
We found one additional RCT (161 women with clomifene-resistant PCOS) comparing laparoscopic
drilling versus metformin. If spontaneous ovulation or pregnancy was not achieved within 3 months
after treatment, clomifene was added for both groups. The RCT found no significant difference
between laparoscopic drilling and metformin in pregnancy or ovulation rates (follow-up time not
reported) (pregnancy: 58/97 [60%] with laparoscopic drilling v 41/64 [64%] with metformin; ovulation
rate: 81/97 [84%] with laparoscopic drilling v 51/64 [80%] with metformin; results reported as not
[33]
significant for both outcomes; P values not reported).
LOD versus LOD plus metformin:
We found one systematic review (search date 2007), which identified one small RCT comparing
LOD versus LOD plus metformin. It found no significant difference between groups in pregnancy
rates or live birth rates (pregnancy rates: 9/21 [4%] with LOD plus metformin v 4/21 [2%] with LOD;
RR 2.25, 95% CI 0.82 to 6.18; live birth rates: 5/21 [2%] with LOD plus metformin v 4/21 [2%] with
[26]
The review commented that the method of randomisation
LOD; RR 1.25, 95% CI 0.39 to 4.02).
used in the RCT was not clear and the RCT was unblinded.
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14
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LOD versus clomifene:
See benefits of clomifene.
Harms:
Adverse effects associated with LOD include the risks of general anaesthesia, a low risk of postop[34]
[35]
erative adhesion formation,
and pelvic infection.
We found no evidence to support the
suggestion that laparoscopic drilling increases the long-term risk of premature ovarian failure. Although markers of ovarian reserve are reduced after surgery they still remain higher than in similar
[36]
women without PCOS.
Laparoscopic drilling is thought not to increase the risk of multiple
pregnancies as it usually induces spontaneous ovulation, by contrast with the multifollicular ovulation
[15]
that may be induced by the use of gonadotrophins.
LOD versus gonadotrophins:
The systematic review found no significant difference in miscarriage rates between ovarian drilling
and gonadotrophins (4 RCTs: 12/88 [14%] with ovarian drilling v 14/85 [16%] with gonadotrophins;
OR 0.81, 95% CI 0.36 to 1.86). It found significantly lower incidence of multiple pregnancy with
ovarian drilling with or without medical ovulation and gonadotrophins only where there was a direct
comparison between these groups (5 RCTs: multiple pregnancy rate/ongoing pregnancy: 1/84 [1%]
[28]
with ovarian drilling v 14/82 [17%] with gonadotrophins; OR 0.13, 95% CI 0.03 to 0.59).
LOD versus metformin:
The review reported that no multiple pregnancies were observed in the RCT, but gave no further
[26]
information on adverse effects.
[33]
[26]
We found one RCT,
which was excluded from the systematic review.
This RCT found no
significant difference between LOD and metformin in the rates of multiple pregnancy, ovarian hyperstimulation syndrome (OHSS), or ectopic pregnancy (multiple pregnancy: 4/58 [7%] with ovarian
drilling v 2/41 [5%] with metformin; OHSS: 2/58 [3%] with ovarian drilling v 1/41 [2%] with metformin;
ectopic pregnancy: 3/58 [5%] with ovarian drilling v 1/41 [2%] with metformin; all outcomes reported
[33]
as not significant; P values not reported).
LOD versus laparoscopic ovarian drilling plus metformin:
The review gave no information on adverse effects.
LOD versus clomifene:
See harms of clomifene.
Comment:
OPTION
Clinical guide:
The trials of LOD included women who were not ovulating and, therefore, provide some evidence
[28]
that treatment is effective despite the lack of placebo controls.
PULSATILE GONADOTROPHIN-RELEASING HORMONE (GNRH) FOR INFERTILITY CAUSED
BY OVULATION DISORDERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pregnancy rate
Compared with clomifene We don't know whether pulsatile gonadotrophin-releasing hormone (GnRH) plus GnRH
agonist or clomifene are more effective at increasing pregnancy rates in women with polycystic ovary syndrome
(PCOS) (low-quality evidence).
Ovulation rate
Compared with clomifene We don't know whether pulsatile GnRH plus GnRH agonist or clomifene are more effective
at increasing ovulation rates in women with PCOS (low-quality evidence).
Note
We found no clinically important results from RCTs about the effects of pulsatile GnRH compared with human
menopausal gonadotrophin, about pulsatile GnRH plus follicle-stimulating hormone (FSH) compared with FSH alone,
or about pulsatile GnRH plus GnRH agonist compared with pulsatile GnRH alone.
For GRADE evaluation of interventions for female infertility, see table.
Benefits:
Pulsatile gonadotrophin-releasing hormone (GnRH) plus GnRH agonist versus clomifene
(clomiphene):
We found one systematic review (search date 2003, 1 RCT, 28 women with polycystic ovary syn[37]
The RCT compared pulsatile gonadotrophin-releasing hormone (GnRH;
drome [PCOS]).
10–20 µg intravenously [iv] every 90 minutes) immediately after pretreatment with a GnRH agonist
(400 µg intranasally for at least 3 weeks) versus clomifene (50 mg started on cycle day 3–7). It
found no significant difference between treatments in pregnancy rate per woman or ovulation rate
per cycle (pregnancy: 4/16 [25%] with pulsatile GnRH after GnRH agonist v 4/12 [33%] with
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15
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clomifene; OR 0.67, 95% CI 0.13 to 3.43; ovulation: 19/40 [47%] with pulsatile GnRH after GnRH
agonist v 15/25 [60%] with clomifene; OR 0.61, 95% CI 0.23 to 1.65; see comment below). The
review reported that the RCT had methodological weaknesses including no blinding and inadequate
[37]
allocation concealment (allocation by oral communication).
The RCT may have been too small
to detect a clinically important difference between treatments.
Pulsatile GnRH versus other treatments:
The systematic review (search date 2003) identified three RCTs, none of which met Clinical Evidence
inclusion criteria because of small sample sizes. The first RCT (9 women with clomifene-resistant
PCOS) compared pulsatile GnRH versus human menopausal gonadotrophin (hMG), the second
RCT (8 clomifene-resistant women with oligomenorrhoea and infertility for at least 3 years) compared
pulsatile gonadotrophin plus FSH versus FSH alone and the third RCT compared pulsatile GnRH
[37]
after pretreatment with a GnRH agonist versus pulsatile GnRH alone.
Harms:
Pulsatile GnRH plus GnRH agonist versus clomifene:
The RCT identified by the systematic review found no cases of ovarian hyperstimulation syndrome
[37]
(OHSS) or multiple pregnancy per woman in either treatment group, see comment below.
Pulsatile GnRH versus other treatments:
[37]
The RCTs identified by the systematic review did not meet Clinical Evidence inclusion criteria.
One retrospective analysis (229 cycles in 71 women) compared pulsatile GnRH versus gonadotrophins alone and found no significant difference in multiple pregnancy rates after six cycles.
[37]
However, 75% of the multiple pregnancies in the gonadotrophin group were triplets or higher
order multiple pregnancies, whereas all multiple pregnancies in the GnRH group were twins.
Comment:
Case series (256 anovulatory women with hypogonadotrophic hypogonadism having 1043 treatment
cycles) found cumulative pregnancy rates of 59% to 73% at 6 months and 81% to 92% at 12
[38] [39] [40]
Only one series reported the live birth rate; this was 65% after 12 treatment
months.
[40]
cycles.
Clinical guide:
Pulsatile GnRH is used in women with anovulation caused by low serum gonadotrophins and oestrogen concentrations (hypogonadotrophic hypogonadism); however, this treatment is rarely used
nowadays and there is a paucity of recent publications in this area. Hypogonadotrophic hypogonadism is a well-defined condition and so evidence from case series should be generalisable to
most affected women.
OPTION
IN VITRO FERTILISATION (IVF) IN OVULATION DISORDERS. . . . . . . . . . . . . . . . . . . . . . . . . .
Live birth rate
Metformin plus in vitro fertilisation (IVF) compared with IVF alone Adding metformin to IVF or intracytoplasmic sperm
injection (ICSI) seems no more effective than IVF or ICSI alone at increasing live birth rates (moderate-quality evidence).
Pregnancy rate
Metformin plus IVF compared with IVF alone We don't know whether adding metformin to IVF/ICSI is more effective
at increasing pregnancy rates (low-quality evidence).
Note
We found no direct information from RCTs about whether IVF is better than no active treatment in women with ovulation disorders; however, the general body of opinion is that it is a successful treatment.
For GRADE evaluation of interventions for female infertility, see table.
Benefits:
In vitro fertilisation (IVF) versus no treatment:
We found no systematic review or RCTs comparing in vitro fertilisation (IVF) versus no treatment
in women with ovulation disorders. However, RCTs are unlikely to be conducted (see comment).
Metformin plus IVF versus IVF alone:
We found one systematic review (search date 2008, 6 RCTs) comparing metformin as an adjunct
to either IVF or intracytoplasmic sperm injection (ICSI) cycle versus no treatment/placebo with
[23]
One RCT started metformin on
IVF/ICSI in women with polycystic ovary syndrome (PCOS).
the first day of ovarian hyperstimulation with FSH, the other studies used metformin before and
during ovarian hyperstimulation for IVF/ICSI. One of the identified RCTs additionally used an assisted hatching procedure using laser in the following cases: age of woman >35 years, thick zona
pellucida, abnormally shaped zona, or where excessive embryo fragmentation or slowly developing
embryos were noted. The review considered that this procedure was substantively different com-
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16
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pared with that used in the other trials, and so it pooled data on outcomes from all relevant RCTs,
and also excluded this study to pool data separately from studies where no assisted hatching procedure was used. We have presented both these analyses for the outcomes of live birth rate and
clinical pregnancy rate.
The review found no significant difference in live birth rate between adding metformin or adding
placebo/no treatment to IVF/ICSI, in all trials or in the subgroup of trials that did not use assisted
hatching procedure (all trials: 3 RCTs: 39/136 [29%] with metformin v 33/136 [24%] with placebo/no
treatment; OR [placebo v metformin] 0.77, 95% CI 0.27 to 2.18; trials without assisted hatching
procedure: 2 RCTs: 29/83 [35%] with metformin v 17/81 [21%] with placebo/no treatment; OR
[placebo v metformin] 0.49, 95% CI 0.17 to 1.38). It found no significant difference between groups
in clinical pregnancy rate in all trials (all trials: 5 RCTs: 71/216 [33%] with metformin v 56/210 [27%]
with placebo/no treatment; OR [placebo v metformin] 0.71, 95% CI 0.39 to 1.28). However, it found
that metformin significantly increased the clinical pregnancy rate compared with placebo or no
treatment group in trials in women who had no assisted hatching procedure (trials without assisted
hatching procedure: 4 RCTs: 55/163 [34%] with metformin v 34/155 [22%] with placebo or no
[23]
treatment; OR [placebo v metformin] 0.53, 95% CI 0.32 to 0.89).
It found no reduction in the
number of oocytes retrieved.
IVF plus gonadotrophin-releasing hormone (GnRH) antagonist in controlled ovarian hyperstimulation versus IVF plus GnRH agonist:
See benefits of GnRH antagonist.
Harms:
IVF versus no treatment:
We found no RCTs (see harms of IVF under treatments for tubal infertility).
Metformin plus IVF versus IVF alone:
The review found no significant difference between groups in miscarriage rate per woman (4 RCTs:
16/145 [11%] with metformin v 18/144 [13%] with placebo or no treatment; OR 0.84, 95% CI 0.40
[23]
However, it should be noted that metformin was not continued during pregnancy in
to 1.75).
any of the studies. The review found a significantly reduced rate of ovarian hyperstimulation syndrome (OHSS) associated with adding metformin compared with adding placebo/no treatment to
IVF/ICSI (5 RCTs: 13/227 [6%] with metformin v 47/222 [21%] with placebo or no treatment; OR
0.27, 95% CI 0.16 to 0.47). However, it found a significantly higher incidence of adverse effects
with adding metformin compared with adding placebo/no treatment (3 RCTs: 46/135 [34%] with
metformin v 13/136 [10%] with placebo or no treatment; OR [placebo v metformin] 0.22, 95% CI
[23]
0.05 to 0.99).
IVF plus GnRH antagonist in controlled ovarian hyperstimulation versus IVF plus GnRH
agonist:
See harms of GnRH antagonist.
Comment:
RCTs comparing IVF versus no treatment are unlikely to be conducted. The European Society of
Reproduction and Embryology (ESHRE) consensus on infertility treatment related to PCOS recom[15]
mendation has stated that anovulation is not an indication for IVF.
We found one systematic review (search date 2004) examining the outcomes of conventional IVF
[41]
The review identified no RCTs, but it pooled data from observational
in women with PCOS.
studies comparing IVF outcomes in women with PCOS versus primarily age-matched controls
without PCOS (8 retrospective studies, 1 prospective study; 458 women with PCOS [793 cycles]
and 694 matched controls [1116 cycles]). It found that women with PCOS had a significantly reduced
chance of reaching oocyte retrieval in an IVF cycle (cycle cancellation) compared with matched
controls (OR 0.5, 95% CI 0.2 to 1.0). However, it found no significant difference in the chance of
embryo transfer per oocyte retrieval (OR 0.7, 95% CI 0.4 to 1.3). It found that significantly more
oocytes were obtained per retrieval in women with PCOS (absolute results not reported, WMD 3.4,
95% CI 1.7 to 5.1), but it found no significant difference between groups in the clinical pregnancy
rates per started cycle (OR 1.0, 95% CI 0.8 to 1.3). It found that the incidence of OHSS was rarely
reported in identified studies. It found that women with PCOS and controls undergoing IVF achieved
[41]
similar pregnancy and live birth rates per cycle.
Clinical guide:
These results suggest that IVF is as successful in anovulatory women as it is in normo-ovulatory
women although it is expected that these women are at an increased risk of OHSS. It is unlikely
that pregnancy rates between women with ovulation disorders and normo-ovulatory women will
differ as anovulation does not affect uterine receptivity for implantation. Once ovulation is achieved,
the chance of pregnancy should not differ. The use of metformin should be strongly encouraged
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17
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as an adjunct to an IVF/ICSI cycle as it reduces the incidence of OHSS without an apparent influence
on live birth rates, although with an increased incidence of adverse effects.
OPTION
INTRAUTERINE INSEMINATION ALONE, OR COMBINED WITH GONADOTROPHINS OR
CLOMIFENE FOR INFERTILITY CAUSED BY OVULATION DISORDERS. . . . . . . . . . . . . . . . .
We found no clinically important results from RCTs about the effects of intrauterine insemination (IUI) alone,
or combined with gonadotrophins or clomifene in women with ovulation disorders.
Note
The use of IUI for women with ovulatory disorder is not standard.
For GRADE evaluation of interventions for female infertility, see table.
Benefits:
Intrauterine insemination (IUI) alone or plus gonadotrophins or clomifene versus placebo/no
treatment:
We found no systematic review or RCTs.
IUI alone or plus gonadotrophins or clomifene versus each other:
We found one systematic review (search date 2006) comparing human chorionic gonadotrophin
(hCG) versus conservative urinary luteinising monitoring for timing of IUI. The review reported a
subgroup analysis in women with ovulatory disorder. However, the data were primarily derived
from observational studies (2 retrospective observational studies [199 women], 1 crossover study
[42]
For further information on results from this meta-analysis, see comment below.
[37 women]).
Harms:
IUI alone or plus gonadotrophins or clomifene versus placebo/no treatment:
We found no RCTs.
IUI alone or plus gonadotrophins or clomifene versus each other:
The review gave no information on adverse effects of treatments in the subgroup of women with
[42]
ovulation disorders.
Comment:
IUI alone or plus gonadotrophins or clomifene versus each other:
The systematic review found no significant difference in pregnancy rates between IUI plus hCG
plus clomifene versus IUI plus clomifene plus urinary luteinising hormone monitoring. However,
pregnancy rate was higher with IUI plus hCG plus clomifene (18/112 [16%] with IUI plus hCG plus
clomifene v 10/124 [8%] with IUI plus clomifene plus urinary luteinising hormone monitoring; OR
[42]
2.00, 95% CI 0.84 to 4.77).
Clinical guide:
Guidelines from the European Society of Reproduction and Embryology and the American Society
of Reproductive Medicine state that for pure ovulatory disorder, the addition of IUI to the ovulation
induction protocol is not indicated unless there is an associated male factor or after several unsuc[15]
cessful attempts.
It is interesting that there is a lack of evidence on the effects of IUI plus controlled ovarian stimulation
in the treatment of infertility caused by ovulation disorders. Consensus considers IUI plus controlled
ovarian stimulation as effective in the management of infertility owing to cervical hostility, unexplained
infertility, and mild male factor infertility.
OPTION
GONADOTROPHIN PRIMING OF OOCYTES BEFORE IN VITRO MATURATION. . . . . . . . . . . .
Pregnancy rate
Compared with no priming We don't know whether gonadotrophin priming (with recombinant follicle-stimulating
hormone [follitropin], human chorionic gonadotrophin [hCG], or follitropin plus hCG) of immature oocytes before in
vitro maturation increases pregnancy rates compared with no priming in women with ovulation disorders (very lowquality evidence).
For GRADE evaluation of interventions for female infertility, see table.
Benefits:
Follicle-stimulating hormone (follitropin) for priming versus no priming:
We found one RCT (28 women with polycystic ovary syndrome (PCOS) who had not responded
to three or more previous in vitro fertilisation [IVF] treatments), which compared priming with follitropin
(150 IU for 3 days, initiated on day 3 after menstruation, 24 cycles) before harvesting of immature
[43]
oocytes versus no priming (12 cycles).
It found that priming with follitropin significantly increased
pregnancy rates compared with no priming (0/12 [0%] with no priming v 7/24 [29%] with follitropin;
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18
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P <0.05). Pregnancy resulted in a live birth in 3/24 (12%) women who received follitropin (P value
[43]
not reported).
One systematic review (search date 2007) comparing in vitro maturation versus conventional IVF
or intracytoplasmic sperm injection (ISCI) (see comment) also commented on this RCT; however,
[44]
it did not specifically search for or include studies on this comparison.
Human chorionic gonadotrophin (hCG) for priming versus no priming:
We found no RCTs satisfying Clinical Evidence inclusion criteria that compared priming with hCG
versus no priming.
FSH (follitropin) plus hCG for priming versus hCG alone for priming:
We found one RCT (60 women with PCOS, 68 cycles assessed) comparing priming with follitropin
(75 IU for 6 days; 35 cycles) plus hCG (10,000 IU, 36 hours before oocyte retrieval) versus priming
[45]
It found no significant difference in pregnancy rates between
with hCG alone (33 cycles).
priming with follitropin plus hCG and priming with hCG alone (31% with follitropin plus hCG v 36%
with hCG alone; P = 0.799).
Gonadotrophin priming of oocytes before in vitro maturation versus conventional IVF:
We found one systematic review (search date 2007). The review found no RCTs comparing in vitro
maturation (including in vitro maturation with gonadotrophins or gonadotrophin priming before in
vitro maturation) versus conventional IVF. For comment and information from observational studies
[44]
on the benefits of in vitro maturation versus conventional IVF or ICSI, see comment.
Harms:
FSH (follitropin) for priming versus no priming:
[43]
The RCTs gave no information on adverse effects.
Human chorionic gonadotrophin for priming versus no priming:
We found no RCTs satisfying Clinical Evidence inclusion criteria.
FSH (follitropin) plus hCG for priming versus hCG alone for priming:
[45]
The RCTs gave no information on adverse effects.
Gonadotrophin priming of oocytes before in vitro maturation versus conventional IVF:
We found no RCTs. For comment and information from observational studies on the adverse effects
of in vitro maturation versus conventional IVF or ICSI, see comment.
Comment:
Clinical guide:
There is little information about the maturational capacity of immature oocytes derived from women
with ovulation disorders who have been primed with gonadotrophins. In vitro maturation of oocytes
may reduce the risk of ovarian hyperstimulation and may simplify treatment of women with ovulation
disorders. However, the maturation rate of immature oocytes retrieved from women with ovulation
disorders, particularly PCOS, is lower than that of those retrieved from women with normal men[46]
strual cycles.
More RCTs are needed to reach a firm conclusion.
The systematic review, described in the benefits section, reported that it found observational evidence to support the use of in vitro maturation as a promising alternative to conventional IVF or
ICSI in women with PCOS, especially regarding the prevention of ovarian hyperstimulation syndrome
[44]
It noted the following from observational studies with regard to in vitro maturation: a
(OHSS).
high maturation rate of oocytes (up to 80%), fertilisation rates (ranging from 10% to 77%), live birth
rates (up to 33% per cycle), and similar frequency of chromosomal abnormalities and outcomes
[44]
The review
compared with women undergoing conventional assisted reproduction techniques.
commented that rates of miscarriage, ectopic pregnancy, and late fetal loss were similar with in
[44]
vitro maturation and IVF or ICSI in women with PCOS.
QUESTION
What are the effects of treatments for tubal infertility?
OPTION
SELECTIVE SALPINGOGRAPHY PLUS TUBAL CATHETERISATION FOR TUBAL INFERTILITY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
We found no clinically important results from RCTs about the effects of selective salpingography plus tubal
catheterisation compared with no active treatment in women with tubal infertility.
For GRADE evaluation of interventions for female infertility, see table.
Benefits:
We found no systematic review or RCTs. For information on effects of selective salpingography
plus tubal catheterisation from observational studies, see comment.
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Harms:
We found no RCTs. For information on adverse effects of selective salpingography plus tubal
catheterisation from observational studies, see comment.
Comment:
One systematic review (search date not reported) combined data from 10 cohort and other observational studies of selective salpingography and tubal cannulation (482 women), and four observa[48]
tional studies of hysteroscopic cannulation for proximal tubal blockage (133 women).
Crude
analysis of aggregated data suggests that hysteroscopic cannulation was associated with a higher
pregnancy rate compared with selective salpingography and tubal catheterisation (65/133 [49%]
with hysteroscopic cannulation v 103/482 [21%] with selective salpingography and tubal catheterisation). Heterogeneity analysis revealed two distinct prognostic subgroups within the selective
salpingography and tubal catheterisation cohort — one with low (12%) and the other with high
(39%) pregnancy rates. None of the observational studies included an untreated group, so it is not
possible to estimate the treatment-related pregnancy rate over and above the spontaneous pregnancy rate.Tubal patency and pregnancy without treatment have been reported in women diagnosed
[49]
with bilateral proximal tube obstruction.
Observational studies found that ectopic pregnancy occurred in 3% to 9% of women having selective
salpingography and tubal catheterisation and that tubal perforation, which does not seem to be
[48] [50]
clinically important, occurred in 2%.
OPTION
TUBAL FLUSHING WITH OIL SOLUBLE MEDIA FOR TUBAL INFERTILITY. . . . . . . . . . . . . . .
Pregnancy rate
Compared with water-based media We don't know whether tubal flushing with oil-based media or tubal flushing with
water-based media are more effective at increasing pregnancy rates in women with infertility because of tubal infertility (low-quality evidence).
Note
We found no clinically important results from RCTs about the effects of tubal flushing compared with no intervention
solely in women with tubal infertility.
For GRADE evaluation of interventions for female infertility, see table.
Benefits:
Tubal flushing with oil soluble media versus no intervention:
We found no systematic review or RCTs solely in women with tubal infertility. We found one systematic review (search date 2007), which compared tubal flushing with oil soluble media versus
[51]
For data on pregnancy rate and live
no intervention in women with various causes of infertility.
birth rate in women with infertility of any cause from this review, see comment in option on flushing
in women with infertility of any cause, in question on endometriosis.
Tubal flushing with oil soluble media versus tubal flushing with water soluble media:
We found one systematic review (search date 2007), which compared tubal flushing with oil soluble
[51]
The review carried out a subgroup analysis of women with
media versus water soluble media.
tubal infertility. It found no significant difference in pregnancy rate between flushing with oil soluble
media and flushing with water soluble media (subgroup analysis from 1 RCT: 2/12 [17%] with oil
[51]
For
soluble media v 3/19 [16%] with water soluble media; Peto OR 1.06, 95% CI 0.15 to 7.36).
information on tubal flushing in women with any cause of infertility, see comment in option on
flushing in women with infertility of any cause, in question on endometriosis.
Tubal flushing with oil soluble plus water soluble contrast media versus tubal flushing with
water soluble media only:
We found one systematic review (search date 2007, 5 RCTs, women with infertility of any cause
who had been attempting conception for >12 months). The review carried out a subgroup analysis
of pregnancy rate in women with tubal infertility. However, this subgroup of women (13 women)
[51]
was too small to make any reliable conclusions.
For data on pregnancy rate and live birth rate
in women with infertility of any cause from this review, see comment in option on flushing in women
with infertility of any cause, in question on endometriosis.
Harms:
Tubal flushing with oil soluble media versus no intervention:
We found no RCTs solely in women with tubal fertility. For information on adverse effects of tubal
flushing in women with any cause of infertility, see comment in option on flushing in women with
infertility of any cause, in question on endometriosis.
Tubal flushing with oil soluble media versus tubal flushing with water soluble media:
The systematic review did not report adverse effects separately for women with tubal fertility. For
information on adverse effects in women with infertility of any cause, see comment in option on
flushing in women with infertility of any cause, in question on endometriosis.
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20
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Tubal flushing with oil soluble plus water soluble contrast media versus tubal flushing with
water soluble media only:
The systematic review did not report adverse effects separately for women with tubal fertility. For
information on adverse effects in women with infertility of any cause see comment in option on
flushing in women with infertility of any cause, in question on endometriosis.
Comment:
OPTION
None.
TUBAL FLUSHING WITH WATER SOLUBLE MEDIA FOR TUBAL INFERTILITY. . . . . . . . . . . .
Pregnancy rate
Compared with oil-based media We don't know whether tubal flushing with water-based media or tubal flushing with
oil-based media is more effective at increasing pregnancy rates in women with infertility because of tubal infertility
(low-quality evidence).
Note
We found no clinically important results from RCTs about tubal flushing solely in women with tubal infertility.
For GRADE evaluation of interventions for female infertility, see table.
Benefits:
Water soluble media versus no intervention:
We found no systematic review or RCTs solely in women with tubal infertility. For information on
tubal flushing in women with any cause of infertility, see comment in option on flushing in women
with infertility of any cause, in question on endometriosis.
Tubal flushing with water soluble versus tubal flushing with oil soluble media:
See benefits of tubal flushing with oil soluble media.
Tubal flushing with oil soluble contrast media plus water soluble media versus water soluble
media:
See benefits of tubal flushing with oil soluble media.
Harms:
Water soluble media versus no intervention:
We found no systematic review or RCTs solely in women with tubal infertility. For information on
tubal flushing in women with any cause of infertility, see comment in option on flushing in women
with infertility of any cause, in question on endometriosis.
Tubal flushing with water soluble versus tubal flushing with oil soluble media:
See harms of tubal flushing with oil soluble media.
Tubal flushing with oil soluble contrast media plus water soluble media versus water soluble
media:
See harms of tubal flushing with oil soluble media.
Comment:
Clinical guide:
The clinical impression of an enhanced pregnancy rate after performing HyCoSy could not be
confirmed. Tubal investigation with sonography using water-soluble contrast has a function as a
[52]
diagnostic procedure but not in terms of increasing pregnancy rates in subfertile patients.
OPTION
TUBAL SURGERY FOR TUBAL INFERTILITY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Live birth rate
Compared with no treatment or medical treatment Tubal surgery seems more effective than no treatment or medical
treatment at increasing live birth rates in women with hydrosalpinges who are undergoing in vitro fertilisation (IVF)
(moderate-quality evidence).
Pregnancy rate
Compared with no treatment or medical treatment Tubal surgery may be more effective than no treatment or medical
treatment at increasing pregnancy rates in women with hydrosalpinges who are undergoing IVF (low-quality evidence).
CO2 laser adhesiolysis compared with diathermy adhesiolysis CO2 laser adhesiolysis is as effective as diathermy
adhesiolysis at increasing pregnancy rates (moderate-quality evidence).
Note
We found no clinically important results from RCTs about the effects of tubal surgery compared with IVF in women
with tubal infertility.
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21
Women's health
Female infertility
For GRADE evaluation of interventions for female infertility, see table.
Benefits:
Tubal surgery versus no treatment or medical treatment:
[53]
[54]
and 2007
), which found no RCTs
We found two systematic reviews (search dates 2005
comparing infertility surgery versus no treatment or alternative treatments.
We found one systematic review (search date 2004, 3 RCTs, 295 women with hydrosalpinges
[55]
having in vitro fertilisation [IVF] treatment).
The review found that tubal surgery before IVF
significantly increased pregnancy and live birth rates compared with no treatment or medical
treatment before IVF (pregnancy rate: 60/161 [37%] with surgery v 34/134 [25%] with no treatment
or medical treatment; OR 1.75, 95% CI 1.07 to 2.86; live birth rate: 48/161 [30%] with surgery v
[55]
22/134 [16%] with no treatment or medical treatment; OR 2.13, 95% CI 1.24 to 3.65).
A variety
of different surgical techniques were used in the included RCTs; however, laparoscopic unilateral
[55]
or bilateral salpingectomy were the most common (numerical data not reported).
We found one additional three-armed unblinded RCT (115 women with unilateral or bilateral hydrosalpinges), comparing surgery (laparoscopic proximal tubal occlusion [50 women] or salpingec[56]
It
tomy [50 women]) with no treatment (15 women) before IVF in women with hydrosalpinges.
found that proximal tubal occlusion before IVF significantly increased implantation rate, clinical
pregnancy rate, and ongoing-pregnancy rate compared with no treatment before IVF (implantation:
20% with surgery v 6% with no treatment; OR 4.1, 95% CI 0.9 to 18.4; clinical pregnancy: 44%
with surgery v 14% with no treatment; OR 4.8, 95% CI 0.9 to 23.9; ongoing pregnancy: 38% with
surgery v 7% with no treatment; OR 7.9, 95% CI 0.9 to 65.8; absolute numbers not reported). It
found that salpingectomy before IVF significantly increased implantation, clinical pregnancy, and
ongoing pregnancy compared with no treatment before IVF (implantation rate: 25% with surgery
v 6% with no treatment; OR 5.6, 95% CI 1.3 to 24.7; clinical pregnancy rate: 55% with surgery v
14% with no treatment; OR 7.4, 95% CI 1.5 to 36.9; ongoing pregnancy rate: 49% with surgery v
[56]
7% with no treatment; OR 12.5, 95% CI 1.5 to 103.1; absolute numbers not reported).
The RCT
stated that proximal tubal occlusion was carried out laparoscopically with bipolar diathermy applied
on the isthmic segment at two separate sites and the hydrosalpinx was not drained. All the salp[56]
ingectomies were done laparoscopically.
The variation between numbers of participants in the
three groups (50, 50, 15 women) casts doubt on the claim that this study was randomised.
Different types of tubal surgery versus each other:
[53]
We found one systematic review (search date 2005, 7 RCTs).
The review did not pool the data.
Many of the included RCTs were small, used outdated surgical techniques, and had problems relating to methods of randomisation, and therefore did not meet Clinical Evidence inclusion criteria.
These data precede recent improvements in case selection and laparoscopic training. One RCT
(63 women) identified by the review found no significant difference in pregnancy rates between
CO2 laser adhesiolysis and diathermy adhesiolysis (16/30 [53%] with laser v 17/33 [52%] with
diathermy; OR 1.07, 95% CI 0.40 to 2.87). Another RCT (67 women) found no significant difference
in pregnancy rates between CO2 laser salpingostomy and diathermy salpingostomy (11/37 [30%]
[53]
A third
with laser v 7/30 [23%] with diathermy; OR for pregnancy 1.38, 95% CI 0.47 to 4.05).
RCT (240 women) compared the use of thermocoagulation versus electrocoagulation for adhesiolysis. It found no significant difference between the two groups at 6 months in pregnancy rates
(32/120 [27%] with thermocoagulation v 37/120 [31%] with electrocoagulation; OR 0.87, 95% CI
[53]
0.51 to 1.46).
We found one subsequent unblinded three-armed RCT (115 women) comparing laparoscopic
proximal tubal occlusion, laparoscopic salpingectomy for hydrosalpinges, and no treatment before
IVF treatment (see above for full description of this study). It found no significant difference in implantation rates, clinical pregnancy rates, or ongoing pregnancy rates between groups (92 women:
implantation rate: 20% with proximal tubal occlusion v 25% with salpingectomy; OR 1.4, 95% CI
0.7 to 2.5; clinical pregnancy rate: 44% with proximal tubal occlusion v 55% with salpingectomy;
OR 1.5, 95% CI 0.7 to 3.5; ongoing pregnancy rate: 38% with proximal tubal occlusion v 49% with
[56]
salpingectomy; OR 1.6, 95% CI 0.7 to 3.6, absolute results not reported).
Tubal surgery versus IVF:
[53]
We found two systematic reviews, which found no RCTs.
Harms:
[54]
Tubal surgery versus no treatment or medical treatment:
The review found no significant difference between tubal surgery and no treatment or medical
treatment in the rate of ectopic pregnancy, miscarriage per pregnancy, or treatment-related complications (ectopic pregnancy: OR 0.42, 95% CI 0.08 to 2.14; miscarriage: OR 0.49, 95% CI 0.16
[55]
Tubal surgery involves general
to 1.52; complications: OR 5.80, 95% CI 0.35 to 96.79).
anaesthesia and admission to hospital. There is a risk of ectopic pregnancy caused by pre-existing
tubal damage; retrospective studies have reported rates of 7% to 9% with tubal surgery, compared
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22
Women's health
Female infertility
[57]
[58]
with 1% to 3% with IVF.
IVF carries the risk of multiple pregnancy and ovarian hyperstimulation syndrome (see harms of IVF under treatments for tubal infertility).
The additional RCT found no significant difference in miscarriage or ectopic pregnancy with proximal
tubal occlusion versus no treatment (miscarriage rate: 4% with proximal tubal occlusion v 7% with
no treatment; OR 0.6, 95% CI 0.05 to 7.2; ectopic pregnancy rate: OR 1.1, 95% CI 0.9 to 1.1). It
also found no significant difference in miscarriage rate with salpingectomy versus no treatment
[56]
(6% with salpingectomy v 7% without treatment; OR 0.9, 95% CI 0.08 to 9.3).
Different types of tubal surgery versus each other:
The RCT in the updated systematic review showed infection rate to be significantly reduced when
hydrotubation was carried with antibiotic compared with hydrotubation without antibiotic (1 RCT;
0/91 [0%] with hydrotubation with antibiotic v 23/100 [23%] with hydrotubation without antibiotic;
[53]
OR 0.12, 95% CI 0.05 to 0.28).
The additional RCT found no significant difference in miscarriage or ectopic pregnancy with proximal
tubal occlusion versus salpingectomy (miscarriage: OR 1.5, 95% CI 0.2 to 9.2; ectopic pregnancy:
[56]
OR 0.9, 95% CI 0.9 to 1.1).
Tubal surgery versus IVF:
We found no RCTs.
Comment:
Different types of tubal surgery versus each other:
One additional systematic review (search date not reported, 7 observational studies, 279 women
with proximal tubal blockage) compared microsurgery (275 women) versus macrosurgery (104
[48]
It found that microsurgery significantly increased pregnancy rates compared with
women).
macrosurgery (RR 2.2, 95% CI 1.5 to 3.2).
Clinical guide:
Success rates with tubal surgery depend on the severity and site of disease. The best figures from
surgery in women with distal tubal occlusion are live birth rates of 20% to 30%, with rates of 40%
[59] [60] [61] [62] [63]
to 60% reported for the less common proximal occlusion.
Tubal surgery versus IVF:
Fertility rates from case series of tubal surgery and from large databases of couples having IVF
suggest that tubal surgery is as effective as IVF in women with filmy adhesions, mild distal tubal
[59] [64] [65] [66] [67] [68]
If successful, tubal surgery allows
occlusion, or proximal obstruction.
women to have more pregnancies without further medical intervention and without the risks asso[69]
ciated with IVF.
Adding postoperative treatments to tubal surgery:
We found one systematic review (search date 2008, 5 RCTs, 588 women) comparing early postoperative hydrotubation or second-look laparoscopy plus adhesiolysis after tubal surgery versus
control (late postoperative hydrotubation, postoperative irrigation with antibiotics plus late postop[70]
erative hydrotubation, no postoperative hydrotubation, or no second look laparoscopy).
It found
that all the RCTs were either poor quality or underpowered. One three-armed RCT (206 women),
identified by the review, compared postoperative hydrotubation with corticosteroid versus hydrotubation without corticosteroid versus no hydrotubation after tubal surgery. It found no significant
difference in pregnancy, live birth, ectopic pregnancy, or miscarriage rates between hydrotubation
(with or without corticosteroids) and no hydrotubation after 24 months. It also found no significant
difference in these outcomes between hydrotubation with corticosteroid and hydrotubation without
corticosteroid. A second three-armed RCT, identified by the review, compared early postoperative
hydrotubation versus late hydrotubation versus late hydrotubation with antibiotic (gentamicin). It
found that hydrotubation with antibiotic significantly increased pregnancy rate and live birth rate
compared with hydrotubation without antibiotic. However, it found no significant difference in ectopic
pregnancy rates between hydrotubation with antibiotics and hydrotubation without antibiotics. It
found no significant difference in pregnancy rate or live birth rate between early hydrotubation and
late hydrotubation (no antibiotic). However, early hydrotubation was associated with significantly
[70]
The review pooled
increased infective morbidity compared with late non-antibiotic hydrotubation.
data from two RCTs comparing second-look laparoscopy with adhesiolysis versus no second-look
laparoscopy. The review found no significant difference in pregnancy, live birth, ectopic pregnancy,
[70]
or miscarriage rates between groups.
OPTION
IN VITRO FERTILISATION (IVF) IN TUBAL OBSTRUCTION FOR TUBAL INFERTILITY. . . . . .
Note
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23
Women's health
Female infertility
We found no clinically important results from RCTs about the effects of in vitro fertilisation (IVF) compared
with no treatment or with tubal surgery in women with tubal infertility alone.
For GRADE evaluation of interventions for female infertility, see table.
Benefits:
In vitro fertilisation (IVF) versus no treatment:
We found no systematic review or RCTs.
Immediate versus delayed IVF:
We found one RCT (399 couples with any cause of infertility; the couples who received delayed
[71]
IVF acted as untreated controls for at least 6 months).
The RCT did not present results separately for women with tubal obstruction (see comment).
IVF versus tubal surgery:
We found no RCTs. See comment of tubal surgery for tubal infertility.
Harms:
IVF versus no treatment:
We found no RCTs.
Immediate versus delayed IVF:
The RCT found no difference between treatments in the overall rate of miscarriage or ectopic
pregnancy; however, the study may have been too small to detect a clinically important difference
(miscarriage: 6/33 [18%] with immediate IVF v 2/13 [15%] with delayed IVF; significance not reported;
ectopic pregnancy: 5/33 [15%] with immediate IVF v 3/13 [23%] with delayed IVF; significance not
[71]
reported).
IVF versus tubal surgery:
We found no RCTs. See comment of tubal surgery for tubal infertility.
Comment:
Immediate versus delayed in vitro fertilisation (IVF) in infertility of any cause:
The RCT (399 couples with any cause of infertility; the couples who received delayed IVF acted
as untreated controls for at least 6 months), found that immediate IVF significantly increased
pregnancy rate and number of live births compared with delayed IVF (pregnancy rate: 33/190 [17%]
with immediate IVF v 13/163 [8%] with delayed IVF; RR 2.43, 95% CI 1.18 to 5.07; number of live
births: 22/190 [12%] with immediate IVF v 8/163 [5%] with delayed IVF; RR 2.36, 95% CI 1.03 to
[71]
5.66).
IVF versus ICSI:
We found one systematic review (search date 2002, 1 RCT), which compared IVF (224 cycles
assessed) versus ICSI (211 cycles assessed) in women with various causes of infertility including
[72]
tubal infertility.
The RCT found no significant difference in pregnancy rates between treatments.
[72] [73]
It found no significant difference between treatments in multiple pregnancy rate.
It found
that ovarian hyperstimulation syndrome occurred in seven (4%) IVF cycles and nine (5%) ICSI
[73]
cycles (significance not reported).
Clinical guide:
The success of IVF is influenced by a woman's age, duration of infertility, and previous pregnancy
[8]
Pregnancy rates are highest between the ages of 25 and 35 years and decline steeply
history.
after 35 years. Similar clinics, which describe the same methods, report different success rates for
[8]
IVF.
In the UK Human Fertilisation and Embryology Authority database, the average live birth
rate per IVF cycle in 2006–2007 was 24%, ICSI representing 48% of all IVF treatment in the UK
[74]
[75]
in 2007. The remainder were conventional IVF,
if ICSI cycles were taken into account.
The
[76]
[77] [78]
equivalent average figure in the USA is 36%,
but again results vary among centres.
In the UK, larger centres (200 or more cycles a year) report slightly higher live birth rates than
[79]
smaller centres (20–29% variation among centres in the UK).
Such a difference has not been
reported consistently in the USA.
Multiple births:
Of the 6309 live births after IVF in the UK in 2000–2001, 27% were multiple, including 109 (2%)
[75]
Of the 11,091 successful births giving rise to 13,672 babies after IVF in the UK in 2007,
triplets.
23% were multiple births. In the UK, the number of embryos that can be replaced is restricted to
[75]
two.
In the USA, where there are no such restrictions, 15 367 live births included 38% multiple
[77]
births, 6% of which were triplets and above.
Of 54,656 infants born through assisted reproductive
technology, 48% were multiple-birth deliveries.
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24
Women's health
Female infertility
Ovarian hyperstimulation syndrome:
One non-systematic review suggested that severe ovarian hyperstimulation syndrome (OHSS)
[80]
Another report for the UK Human Fertilisation and Emoccurs in 0.5% to 2% of all IVF cycles.
bryology Authority in 2005, updated in 2008, found that severe OHSS occurs in approximately 1%
[81]
of cycles.
Obstetric outcome:
We found one systematic review (search date 1998, 42 high-quality observational studies) that
compared obstetric outcome in mothers receiving IVF versus either a population-based control
[82]
It found that children born
group or a selected control group matched for different variables.
after IVF had a considerably higher risk of being born preterm and with a lower birth weight than
children conceived naturally, although this was likely to be because of the high incidence of multiple
births and maternal characteristics such as nulliparity, increased age, previous infertility, and obstetric history (absolute numbers not reported). There was no evidence of an increased overall incidence of congenital malformations in children born after conventional IVF or after embryo cryopreservation.
QUESTION
What are the effects of treatments for infertility associated with endometriosis?
OPTION
DRUG-INDUCED OVARIAN SUPPRESSION FOR INFERTILITY ASSOCIATED WITH ENDOMETRIOSIS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pregnancy rate
Compared with placebo Ovulation-suppression agents (medroxyprogesterone, gestrinone, combined oral contraceptives, danazol, and gonadotrophin-releasing hormone [GnRH] analogue) seem no more effective at increasing
pregnancy rates in women with endometriosis (moderate-quality evidence).
For GRADE evaluation of interventions for female infertility, see table.
Benefits:
Drug-induced ovarian suppression versus placebo:
We found one systematic review (search date 2009, 11 RCTs, 557 women with visually diagnosed
endometriosis who had been attempting conception for >12 months), which compared ovulation
suppression agents (medroxyprogesterone, gestrinone, combined oral contraceptives, danazol,
and gonadotrophin-releasing hormone [GnRH] analogues) versus placebo. It found no significant
difference in pregnancy rates between ovulation suppression agents and placebo (80/287 [28%]
[83]
with suppression agents v 73/270 [27%] with placebo; OR 1.02, 95% CI 0.69 to 1.50).
Drug-induced ovarian suppression versus surgery:
See benefits of laparoscopic ablation of endometrial deposits.
Harms:
Drug-induced ovarian suppression versus placebo:
The review did not report on the incidence of adverse effects in the included studies and did not
pool the data on adverse effects. It reported that GnRH analogue causes hot flushes, vaginal dryness, headache, nasal congestion, and bone loss; danazol has a dose-related adverse effect of
weight gain besides androgenic adverse effects. Weight gain, lack of libido, and depressed mood
are the adverse effects of progestins. Oral contraceptives increase the risk of thromboembolism.
[83]
Drug-induced ovarian suppression versus surgery:
See harms of laparoscopic ablation of endometrial deposits.
Comment:
OPTION
The results reported in the review suggest the use of ovulation suppression has no significant effect
on endometriosis-related infertility. Expectant treatment is preferable over ovarian suppression
[83]
because of its adverse effects.
INTRAUTERINE INSEMINATION ALONE, OR COMBINED WITH GONADOTROPHINS OR
CLOMIFENE FOR INFERTILITY ASSOCIATED WITH ENDOMETRIOSIS. . . . . . . . . . . . . . . . . .
Live birth rate
Compared with no treatment Intrauterine insemination (IUI) plus gonadotrophins (follicle-stimulating hormone [FSH])
is more effective than no treatment at increasing live birth rates in women with minimal or mild endometriosis (highquality evidence).
Pregnancy rate
Compared with intrauterine insemination alone IUI plus gonadotrophins (FSH) is more effective than IUI alone at
increasing pregnancy rates after the first treatment cycle in women with endometriosis (high-quality evidence).
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25
Women's health
Female infertility
Compared with no treatment/expectant management Intrauterine insemination plus clomifene may be more effective
than expectant management at increasing pregnancy rates in women with surgically corrected endometriosis (lowquality evidence).
For GRADE evaluation of interventions for female infertility, see table.
Benefits:
Intrauterine insemination (IUI) plus gonadotrophins versus no treatment or expectant management:
[84]
We found one RCT.
The RCT (103 couples with infertility associated with minimal or mild endometriosis) compared IUI plus gonadotrophins (follicle-stimulating hormone [FSH] 53 couples,
[84]
127 cycles) versus no treatment (50 couples, 184 cycles).
It found that IUI plus FSH significantly
increased live birth rate per cycle compared with no treatment (14/127 [11%] with IUI plus FSH v
[84]
4/184 [2%] with no treatment; OR 5.6, 95% CI 1.8 to 17.4).
IUI plus gonadotrophins versus IUI alone:
We found one RCT (119 couples with primary pelvic or cervical factor infertility for a mean of 3.7
years, 57 couples with infertility associated with endometriosis), which compared alternate cycles
[85]
of gonadotrophins (human menopausal gonadotrophin [hMG]) plus IUI versus IUI alone.
It
found that hMG plus IUI significantly increased the pregnancy rate after the first treatment cycle
compared with IUI alone (11/58 [19%] with hMG plus IUI v 0/61 [0%] with IUI alone; P = 0.0002).
Subgroup analysis of the 57 couples with endometriosis found that hMG plus IUI significantly increased the pregnancy rate per cycle compared with IUI alone (15/127 [12%] with hMG plus IUI v
[85]
2/96 [2%] with IUI alone; RR 5.1, 95% CI 1.1 to 22.5).
IUI plus clomifene versus no treatment or expectant management:
We found one crossover RCT (51 couples, 24/51 [48%] women with unexplained infertility and
27/51 [52%] with endometriosis, duration of infertility 1–3.5 years) comparing IUI plus clomifene
citrate versus expectant management (instruction to have intercourse during the periovulatory pe[86]
riod).
The couples were initially randomised to either four treatment cycles or four control cycles,
followed by cross over to the other arm of the study if no pregnancy occurred. The RCT found
higher pregnancy rates with IUI plus clomifene compared with expectant management after the
initial four cycles (pre-crossover results) but did not assess the significance of the difference (proportion of women who became pregnant: 8/23 [35%] with treatment v 4/28 [14%] with no treatment,
significance not reported). It found that treatment significantly increased the monthly fecundity rate
(calculated from the total number of pregnancies after all cycles) compared with no treatment
(monthly fecundity rate [number of pregnancies/cycles]: 10% [14 pregnancies after 148 cycles]
[86]
with treatment v 3% [5 pregnancies after 150 control cycles] with no treatment; P = 0.03).
Harms:
IUI plus gonadotrophins versus no treatment or expectant management:
[84]
No cases of severe ovarian hyperstimulation were reported in the RCT.
The RCT also reported
two twin births and one triplet birth with IUI plus FSH.
IUI plus gonadotrophins versus IUI alone:
The RCT reported a miscarriage rate of 24% and a multiple birth rate of 18% with gonadotrophin
(hMG) plus IUI (data for IUI treatment alone not reported). No cases of severe ovarian hyperstim[85]
ulation requiring hospital admission were reported in the RCT.
IUI plus clomifene versus no treatment or expectant management:
The RCT found that there were two ectopic pregnancies (14%) with IUI plus clomifene compared
with none with expectant management, but it did not assess the significance of this difference. No
[86]
cases of severe ovarian hyperstimulation were reported in the RCT.
Comment:
OPTION
None.
LAPAROSCOPIC SURGERY FOR INFERTILITY ASSOCIATED WITH ENDOMETRIOSIS. . . . .
Pregnancy rate
Compared with no surgery Laparoscopic ablation or resection of endometrial deposits seems more effective than
diagnostic laparoscopy at increasing live birth rates or ongoing pregnancy rates (moderate-quality evidence).
For GRADE evaluation of interventions for female infertility, see table.
Benefits:
Laparoscopic surgery versus no surgery:
We found one systematic review (search date 2000–2001, 2 RCTs, 437 women), which compared
laparoscopic surgery (ablation or resection of endometrial deposits) versus diagnostic laparoscopy
[87]
(no surgery).
It found that laparoscopic surgery significantly increased the proportion of women
who had a live birth or pregnancy continuing beyond 20 weeks compared with diagnostic laparoscopy
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26
Women's health
Female infertility
(60/223 [27%] with laparoscopic surgery v 39/214 [18%] with diagnostic laparoscopy; RR 1.48,
95% CI 1.03 to 2.11).
Laparoscopic treatment of endometrioma versus no treatment for endometrioma:
We found one systematic review (search date 2007), which found no RCTs comparing laparoscopic
[88]
treatment of endometrioma versus no treatment.
The systematic review identified several observational studies relevant for this comparison, for further information on these see comment.
We found another systematic review (search date 2007), which identified one RCT in women with
endometrioma (3 cm or more in diameter) comparing two different methods of laparoscopic surgery
[89]
(excision or ablation).
The review did not report a direct comparison of laparoscopic surgery
(excision or ablation) versus no treatment. However, it reported on the ovarian response to stimulation with gonadotrophins of the surgically treated (excision or ablation) ovary compared with un[89]
treated ovary in each woman (see comment).
Harms:
Laparoscopic surgery versus no surgery:
The review found no significant difference between laparoscopic surgery and diagnostic laparoscopy
in the proportion of women who miscarried or who had operative complications (miscarriage: 15/223
[7%] with laparoscopic surgery v 11/214 [5%] with diagnostic laparoscopy; RR 1.31, 95% CI 0.62
to 2.78; operative complications: 3/172 [2%] with laparoscopic surgery v 1/169 [1%] with diagnostic
[87]
laparoscopy; RR 2.95, 95% CI 0.31 to 28.06).
Laparoscopic treatment of endometrioma versus no treatment for endometrioma:
The first systematic review found no RCTs. For information on adverse effects from observational
[89]
studies see comment. The second review gave no information on adverse effects.
Comment:
Laparoscopic treatment of endometrioma versus no treatment for endometrioma:
The first systematic review identified five observational studies (3 retrospective case-control studies,
1 prospective and 1 retrospective cohort study), comparing laparoscopic treatment of endometrioma
versus no treatment for endometrioma, before in vitro fertilisation (IVF). The review carried out a
meta-analysis. We have included a comment on these results here, because of the paucity of RCT
data. The review found no significant difference in clinical pregnancy rates following IVF among
women who underwent surgical treatment versus no treatment for endometrioma (4 studies: 65/227
[29%] with treatment for endometrioma v 35/141 [39%] with no treatment for endometrioma; OR
[88]
It also found no significant difference in the number of oocytes re1.34, 95% CI 0.82 to 2.20).
trieved following stimulation or in requirement for gonadotrophin ampoules among women who
underwent surgical treatment versus no treatment for endometrioma (number of oocytes retrieved:
3 studies; 402 cycles: WMD –1.53, 95% CI –3.23 to +0.17; gonadotrophin ampoule requirement:
[88]
2 studies; 158 cycles: WMD +1.55, 95% CI –9.21 to +12.31).
The second review reported no significant difference in ovarian response to gonadotrophin stimulation between the ovary treated with laparoscopic ablation and the untreated ovary in each woman
[89]
(1 RCT: 80 ovaries: WMD –0.20, 95% CI –0.90 to +0.50).
It also found no significant difference
in ovarian response to gonadotrophin stimulation when the ovary treated with laparoscopic excisional surgery was compared with the untreated ovary in each woman (1 RCT: 140 ovaries: WMD
[89]
We found another systematic review (search date 2005, 6 observa0, 95% CI –0.47 to +0.47).
tional studies). It concluded that surgery for endometrioma may result in a decrease in the number
[90]
of oocytes retrieved but the overall fertility outcomes were not affected.
Laparoscopic ablation versus excision of endometrioma:
We found one systematic review (search date 2007, 3 RCTs) comparing laparoscopic ablation
versus excision of endometrioma. It presented results for spontaneous pregnancy rates separately
for the subgroup of women who desired to conceive, and found that excisions surgery significantly
increased 12-month spontaneous pregnancy rates compared with ablative surgery (2 RCTs, 88
women: 22/41 [54%] with excisions surgery v 8/47 [17%] with ablative surgery; OR 5.24, 95% CI
[89]
It also presented results separately in women who underwent fertility treatment
1.92 to 14.27).
(controlled ovarian hyperstimulation) after these two surgical modalities from one RCT. It found no
significant difference in pregnancy rates between groups (pregnancy rate in women who underwent
fertility treatment: 15/41 [37%] with excisions surgery v 7/24 [29%] for ablative surgery; OR 1.40,
[89]
95% CI 0.47 to 4.15).
Clinical guide:
The risks and morbidity of surgery under general anaesthesia and of postoperative adhesion formation need to be balanced against the adverse effects of treatments involving ovarian suppression
or stimulation.
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27
Women's health
Female infertility
OPTION
IN VITRO FERTILISATION IN ENDOMETRIOSIS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
We found no direct information from RCTs about whether IVF is better than no active treatment in women
with infertility associated with endometriosis.
For GRADE evaluation of interventions for female infertility, see table.
Benefits:
In vitro fertilisation (IVF) versus no treatment:
We found no systematic review or RCTs that compared IVF versus no treatment in women with
endometriosis-related infertility.
Immediate versus delayed IVF:
We found no systematic review or RCTs that compared immediate IVF versus delayed IVF solely
in women with endometriosis-related infertility. For data on immediate IVF versus delayed IVF in
women with any cause of infertility see benefits of IVF under treatments for tubal infertility.
Harms:
See harms of in vitro fertilisation under treatments for tubal infertility.
Comment:
We found one systematic review
and two retrospective cohort studies
that examined
the effects of endometriosis compared with other causes of infertility, or the effects of severity of
endometriosis, on IVF outcome. The cohort studies found no significant difference in pregnancy
[92] [93]
rates between groups.
The systematic review (search date 1999, 22 non-randomised
studies) found that women with endometriosis were less likely to become pregnant than women
with infertility because of blocked or damaged tubes (pregnancy assessed by human chorionic
[91]
There is a need for properly
gonadotrophin levels; adjusted OR 0.56, 95% CI 0.44 to 0.70).
controlled prospective randomised studies that present fertility rates with IVF in different stages of
endometriosis using a validated classification system. Comparisons with assisted reproductive
techniques are also required.
[91]
[92]
[93]
Prolonged downregulation versus regular IVF:
We found one systematic review (3 RCTs, 165 women with endometriosis undergoing IVF or intracytoplasmic sperm injection [ICSI]), which concluded that pituitary downregulation with gonadotrophin-releasing hormone (GnRH) agonist for 3 to 6 months significantly increased the clinical
[94]
pregnancy rate.
As for the live birth rate, there was one RCT (67 women) with significant increase
[94]
There was no significant difference in the
in live birth in favour of prolonged downregulation.
dose of follicle-stimulating hormone (FSH) required or duration of administration.
GnRH antagonist versus GnRH agonist protocol for IVF:
We found one RCT (246 women with mild to moderate endometriosis or surgically treated endometrioma or untreated endometrioma) comparing GnRH agonist or GnRH antagonist. There was no
significant difference in the clinical pregnancy rates when either of the protocols were used. The
women treated with GnRH antagonists had a significantly lower number of metaphase II oocytes
[95]
and embryos.
OPTION
TUBAL FLUSHING/UTERINE BATHING WITH CONTRAST MEDIA FOR INFERTILITY ASSOCIATED WITH ENDOMETRIOSIS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . New
Live birth rate
Tubal flushing with oil soluble contrast media compared with no treatment/expectant management Tubal flushing
with oil-based media may be more effective than no treatment at increasing live birth rates at 6 months in women
with minimal or mild endometriosis (low-quality evidence).
Pregnancy rate
Tubal flushing with oil soluble contrast media compared with no treatment/expectant management Tubal flushing
with oil-based media may be more effective than no treatment at increasing pregnancy rate at 6 months in women
with minimal or mild endometriosis (low-quality evidence).
Note
We found no direct information from RCTs about whether tubal flushing with water-based media is better than no
active treatment.
For GRADE evaluation of interventions for female infertility, see table.
Benefits:
Tubal flushing with oil soluble contrast media versus no treatment/expectant management:
We found one systematic review (search date 2007, 1 RCT, 158 women with unexplained infertility
or endometriosis who had been attempting conception for >12 months, 62 women with visually
diagnosed mild endometriosis).The RCT reported a subgroup analysis in women with endometriosis.
© BMJ Publishing Group Ltd 2010. All rights reserved. ..........................................................
28
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Women's health
Female infertility
It found that tubal flushing significantly increased pregnancy rates compared with no treatment in
women with endometriosis (12/25 [48%] with tubal flushing v 4/37 [11%] with no treatment; OR
6.76, 95% CI 2.14 to 21.35). The RCT also found that tubal flushing (oil soluble contrast media)
significantly increased live birth rate compared with no treatment in women with endometriosis
(10/25 [40%] with tubal flushing v 4/37 [11%] with no treatment; OR 5.17, 95% CI 1.55 to17.23).
[51]
[96]
A 2-year follow-up of the RCT identified by the review has been published separately.
It
found no significant difference in pregnancy rate in the longer term (6–24 months) between women
with endometriosis who had tubal flushing with oil soluble contrast media and those with no initial
treatment. This suggests that the benefit in pregnancy rate is observed in the first 6 months after
the procedure. However, these results should be interpreted with caution because a total of 21
women in the original endometriosis subgroup underwent further fertility treatment, and 6 were lost
to follow-up between 6 to 24 months.
Tubal flushing with water soluble contrast media versus no treatment/expectant management:
We found one systematic review (search date 2007), which found no RCTs comparing tubal
[51]
flushing with water soluble media versus no intervention in women with endometriosis.
Harms:
Tubal flushing with oil soluble contrast media versus no treatment/expectant management:
[51]
The review gave no information on adverse effects of treatments for this comparison.
Tubal flushing with water soluble contrast media versus no treatment/expectant management:
We found no RCTs.
Comment:
The mode of action of tubal flushing has not been clearly elucidated. It is believed to act by flushing
out debris, affecting immunological milieu by altering peritoneal macrophages, or modulating the
[51]
Further evidence is needed comparing tubal flushing with other ferendometrial environment.
[51]
tility treatments.
Tubal flushing with oil soluble contrast media versus no treatment/expectant management
(women with any cause of infertility):
We found one systematic review (search date 2007), which compared tubal flushing with oil soluble
[51]
media versus no intervention in women with various causes of infertility.
It found that tubal
flushing with oil soluble media significantly increased pregnancy rate and live birth compared with
no intervention (pregnancy: 3 RCTs; 58/195 [30%] with oil soluble media v 21/187 [11%] with no
intervention; OR 3.30, 95% CI 2.00 to 5.43; live birth: 1 RCT; 23/73 [32%] with oil soluble media v
11/85 [13%] with no intervention; OR 2.98, 95% CI 1.40 to 6.37). The systematic review found no
significant difference between treatments in miscarriage per pregnancy or ectopic pregnancy
(miscarriage per pregnancy: 1 RCT: 4/28 [14%] with oil soluble media v 2/14 [14%] with no intervention; OR 1.00, 95% CI 0.16 to 6.12; ectopic pregnancy: 1 RCT: 1/73 [1%] with oil soluble media
[51]
v 0/85 [0%] with no intervention; OR 8.71, 95% CI 0.17 to 443.93).
However, the number of
ectopic pregnancies was small and the corresponding confidence interval was very wide.
Tubal flushing with water soluble media versus no intervention (women with any cause of
infertility):
We found one systematic review (search date 2007), which found no RCTs comparing tubal
[51]
flushing with water soluble media versus no intervention.
We found one subsequent unblinded
RCT (334 women, mean age 31.9 years, duration of infertility 2.1 years) comparing the spontaneous
pregnancy rates in women undergoing tubal flushing at HyCoSy with water soluble contrast media
[52]
versus women having no flushing of the tubes, as part of infertility investigative work-up.
The
RCT excluded women with severe tubal pathology, those aged 40 years or older, or with suspected
anovulation or severe male factor infertility. It found no significant difference between groups in
clinical pregnancy rates (49/168 [29%] with flushing v 44/166 [27%] with no flushing, difference
+2.7%, 95% CI –6.9% to +12.3%). It also found no significant difference in live birth rates (38/168
[23%] with flushing v 34/166 [21%] with no flushing; difference +2.1%, 95% CI –6.7% to +10.9%).The
RCT found no significant difference between groups in miscarriage rates (9/168 [5%] with flushing
v 8/166 [5%] with no flushing; difference +0.6, 95% CI –4.2 to +5.2). There was one ectopic preg[52]
nancy in each group.
Oil soluble contrast media versus water soluble contrast media (women with infertility due
to endometriosis or with any cause of infertility):
We found one systematic review (search date 2007, 5 RCTs, women with infertility of any cause
who had been attempting conception for >12 months). The review carried out a subgroup analysis
of pregnancy rate in women with infertility due to endometriosis. However, this subgroup of women
[51]
The review found that tubal flushing
(8 women) was too small to make any reliable conclusions.
with oil soluble contrast media (OSCM) significantly increased live birth rates compared with tubal
flushing with water soluble contrast media (WSCM) in women with infertility of any cause; however,
this was of borderline significance (2 RCTs, 931 women: 83/371 [22%] with OSCM v 88/560 [16%]
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29
Women's health
Female infertility
with WSCM; OR 1.49, 95% CI 1.05 to 2.11). It found no significant difference between groups for
pregnancy rates in women with infertility of any cause (5 RCTs; 1454 women; 179/625 [29%] with
oil soluble media v 197/829 [24%] with water soluble media; OR 1.21, 95% CI 0.95 to 1.54).
The review found that extravasation was significantly more frequent with OSCM versus WSCM (3
RCTs, 768 women: 24/272 [9%] with OSCM v 9/496 [2%] with WSCM; OR 5.41, 95% CI 2.57 to
11.37). It found no significant difference between groups in rates of infection; however, this was
lower with OSCM (2 RCTs: women 1/226 [0.4%] with OSCM v 15/436 [3.4%] with WSCM; OR
0.34, 95% CI 0.11 to 1.05). It also found no significant difference between groups for miscarriage
rates or ectopic pregnancy (miscarriage: 1 RCT, 158 women: 19/74 [26%] with OCSM v 25/84
[30%] with WSCM; OR 0.82, 95% CI 0.41 to 1.64; ectopic pregnancy: 1 RCT, 533 women: 2/273
[51]
[1%] with OSCM v 4/260 [2%] with WSCM; OR 0.49, 95% CI 0.10 to 2.42).
The review found that a significantly lower proportion of women had procedural pain, or post-procedure bleeding with oil soluble media compared with water soluble media (immediate pain [within
24 hours]: OR 0.53, 95% CI 0.34 to 0.84; prolonged pain [lasting >24 hours from the procedure]:
OR 0.26, 95% CI 0.15 to 0.45; post-procedure bleeding: 2 RCTs; 662 women: 93/226 [41%] with
oil soluble media v 345/436 [79%] with water soluble media; OR 0.22, 95% CI 0.15 to 0.31). However, it found that intravasation was significantly more common with oil soluble media (3 RCTs;
768 women: 24/272 [9%] with oil soluble media v 9/496 [2%] with water soluble media; OR 5.41,
95% CI 2.57 to 11.37), although the review reported no serious sequelae from this. It found no
significant difference in the proportion of women with infection between groups (2 RCTs; 662
women: 1/226 [0.4%] with oil soluble media v 15/436 [3.4%] with water soluble media; OR 0.34,
[51]
95% CI 0.11 to 1.05).
The odds of obtaining a satisfactory image were significantly decreased for oil soluble media versus
water soluble media for both the uterine cavity and the tubal ampulla (uterine cavity: 3 RCTs; 773
women: 154/279 [55%] with oil soluble media v 437/494 [89%] with water soluble media; OR 0.18,
95% CI 0.12 to 0.26; tubal ampulla: 3 RCTs; 830 women: 40/323 [12%] with oil soluble media v
[51]
419/507 [83%] with water soluble media; OR 0.05, 95% CI 0.04 to 0.07).
The RCTs comparing
[51]
oil soluble versus water soluble media were statistically heterogeneous.
Oil soluble plus water soluble contrast media versus water soluble media (women with infertility due to endometriosis or with any cause of infertility):
We found one systematic review (search date 2007, 5 RCTs, women with infertility of any cause
who had been attempting conception for >12 months). The review carried out a subgroup analysis
of pregnancy rate in women with infertility due to endometriosis. However, this subgroup of women
[51]
The review found no significant
(9 women) was too small to make any reliable conclusions.
difference in live birth rates or pregnancy rates between tubal flushing with OSCM plus WSCM and
WSCM (live birth rates: 1 RCT, 399 women who had been attempting conception for >12 months:
29/133 [22%] with OSCM plus WSCM v 54/260 [21%] with WSCM; OR 1.06, 95% CI 0.64 to 1.77;
pregnancy rates: 5 RCTs, 662 women: 104/263 [40%] with OSCM plus WSCM v 131/399 [33%]
[51]
with WSCM; OR 1.28, 95% CI 0.92 to 1.79).
The review found no significant difference between
groups for miscarriage rates or ectopic pregnancy (miscarriage: 1 RCT, 130 women: 15/46 [32%]
with OSCM plus WSCM v 25/84 [30%] with WSCM; OR 1.14, 95% CI 0.53 to 2.48; ectopic pregnancy: 2 RCTs, 422 women: 1/148 [1%] with OSCM plus WSCM v 4/274 [1%] with WSCM; OR
[51]
0.54, 95% CI 0.08 to 3.45).
No data were available on other adverse effects of treatments.
Clinical guide:
Although only one small RCT was found solely in women with endometriosis (a priori specified
subgroup in larger trial), the result was highly statistically significant. This remains an intervention
that is not offered on a widespread basis.
QUESTION
What are the effects of treatments for unexplained infertility?
OPTION
CLOMIFENE IN UNEXPLAINED FERTILITY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . New
Live birth rate
Compared with placebo or expectant management Clomifene (clomiphene) is no more effective than no treatment/placebo at increasing live birth rate in women with unexplained infertility (high-quality evidence).
Pregnancy rate
Compared with placebo or expectant management Clomifene seems no more effective than no treatment/placebo
at increasing pregnancy rates in women with unexplained infertility (moderate-quality evidence).
© BMJ Publishing Group Ltd 2010. All rights reserved.
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30
Women's health
Female infertility
Compared with stimulated intrauterine insemination (IUI) We don't know whether clomifene-stimulated IUI or clomifene
plus timed intercourse are more effective at increasing clinical pregnancy rate in women with unexplained infertility
(low-quality evidence).
Note
Clomifene is associated with increased risks of multiple pregnancy. Clomifene treatment, especially after several
cycles, may be associated with a slightly higher risk of neural tube defects and severe hypospadias in the offspring.
For GRADE evaluation of interventions for female infertility, see table.
Benefits:
Clomifene versus placebo or expectant management:
We found one systematic review (search date 2006, 2 RCTs, one of these RCTs reported as a
[97]
conference abstract) comparing clomifene citrate with no treatment or placebo.
The RCT
[98]
identified as an abstract by the review was subsequently reported in full.
We have also reported
this here because it gives information on the outcome of live birth rate and adverse effects (see
harms below).
The review found no significant difference in clinical pregnancy rate between clomifene citrate and
no treatment or placebo for four to six treatment cycles (2 RCTs, 460 women: 40/231 [17.3%] with
clomifene citrate v 40/229 [17.5%] with no treatment or placebo; OR 0.99, 95% CI 0.61 to 1.60;
[97]
P = 0.96).
The RCT subsequently reported in full additionally reported on live birth rate. This
RCT (580 women with unexplained infertility) was a three-armed trial comparing clomifene or unstimulated intrauterine insemination (IUI) versus expectant management. It found no significant
difference in live birth rate between clomifene for six treatment cycles versus expectant management
for 6 months (385 women: 26/194 [14%] with clomifene v 32/193 [17%] with expectant management;
[98]
OR 0.79, 95% CI 0.45 to 1.38; P = 0.49).
Clomifene versus unstimulated IUI:
We found one three-armed RCT (580 women with unexplained infertility) comparing clomifene,
unstimulated IUI, or expectant management. The RCT compared both clomifene and unstimulated
IUI versus expectant management. It was not designed to directly compare clomifene versus unstimulated IUI unless each active treatment was found to be superior to expectant management,
which was not found (see clomifene versus expectant management above, and unstimulated IUI
versus expectant management). It found similar rates of live birth and clinical pregnancy with
clomifene and unstimulated IUI (live birth rate: 26/194 [14%] with clomifene v 43/191 [23%] with
unstimulated IUI; clinical pregnancy rate: 29/192 [15%] with clomifene v 43/191 [23%] with unstim[98]
ulated IUI).
Clomifene versus stimulated IUI:
See benefits of IUI combined with gonadotrophins or clomifene in unexplained infertility.
Clomifene versus in vitro fertilisation (IVF):
We found one systematic review (search date 2004), which found no RCTs assessing IVF in unex[99]
plained infertility.
We found no RCTs.
Harms:
Clomifene versus placebo or expectant management:
[97]
and subsequently reported in full found no significant difference
The RCT identified by the review
in rate of miscarriage between clomifene and expectant management at 6 months' follow-up (385
women: 10/38 [26%] with clomifene v 14/46 [30%] with no treatment; OR 0.82, 95% CI 0.23 to
[98]
2.87; P = 0.86).
It also found no significant difference between clomifene and expectant management in the incidence of multiple pregnancies at 6 months' follow-up (2/192 [1%] with clomifene
[98]
v 2/193 [1%] with expectant management; OR 1.01, 95% CI 0.08 to 13.39; P = 1.0).
The systematic review found no data on the occurrence of ovarian hyperstimulation syndrome
[97]
[97]
(OHSS) in the included RCTs. It did not report on congenital anomalies.
For further information
on congenital anomalies from observational studies see comment below.
Clomifene versus unstimulated IUI:
The RCT found similar rates of miscarriage between clomifene and unstimulated IUI at 6 months'
follow-up; however, it did not present a statistical analysis of the difference (see above) (385
[98]
women: 10/38 [26%] with clomifene v 9/55 [16%] with unstimulated IUI).
It also found similar
rates of multiple pregnancies with clomifene and unstimulated IUI at 6 months' follow-up (2/192
[98]
[1%] with clomifene v 1/191 [1%] with unstimulated IUI).
Clomifene versus stimulated IUI:
See harms of IUI combined with gonadotrophins or clomifene in unexplained infertility.
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31
Women's health
Female infertility
Clomifene versus IVF:
We found no RCTs.
Comment:
We found no systematic review or RCTs giving information on the risk of ovarian cancer associated
with clomifene. Concerns have been raised over a possible association between fertility drugs and
[100]
ovarian cancer.
A case-cohort study has suggested a link with clomifene when used for more
[101]
[102] [103] [104]
than 12 months.
This has been recently challenged by several cohort studies.
[105]
Congenital anomalies We found one systematic review (search date not reported), reporting observational data (case reports, case-control studies, and uncontrolled studies).The review commented that clomifene treatment in mothers, especially after several cycles, might be associated with
[106]
a slightly higher risk of neural tube defects and severe hypospadias in their children.
OPTION
INTRAUTERINE INSEMINATION (IUI) WITHOUT OVARIAN STIMULATION IN UNEXPLAINED
FERTILITY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . New
Live birth rate
Compared with expectant management Unstimulated intrauterine insemination (IUI) seems no more effective than
expectant management at increasing live birth rate at 6 months in women with unexplained infertility (high-quality
evidence).
Compared with in vitro fertilisation (IVF) Unstimulated IUI and IVF seem equally effective at increasing live birth rate
(moderate-quality evidence).
Compared with stimulated IUI Unstimulated IUI is less effective than IUI stimulated with clomifene or gonadotrophins
at increasing live birth after up to six treatment cycles (high-quality evidence).
Pregnancy rate
Compared with expectant management Unstimulated IUI is no more effective than expectant management at increasing clinical pregnancy rate in women with unexplained infertility (high-quality evidence).
Compared with stimulated IUI Unstimulated IUI is less effective than IUI stimulated with clomifene or gonadotrophins
at increasing clinical pregnancy rates (high-quality evidence).
Note
Unstimulated IUI seems not to increase the risk of miscarriage, multiple pregnancy, or ectopic pregnancy in women
with unexplained infertility.
For GRADE evaluation of interventions for female infertility, see table.
Benefits:
Unstimulated intrauterine insemination (IUI) versus expectant management:
[107]
[98]
and one subsequent RCT
examining
We found one systematic review (search date 2005)
the effectiveness of unstimulated IUI. The systematic review found no RCTs meeting its inclusion
criteria. We also found one non-systematic review (see comments).
The subsequent RCT (580 women with unexplained infertility) compared clomifene (clomiphene)
[98]
or unstimulated IUI versus expectant management.
It found no significant difference in live birth
rate between unstimulated IUI after 6 months of treatment cycles versus expectant management
for 6 months (43/191 [23%] with unstimulated IUI v 32/193 [17%] with expectant management; OR
1.46, 95% CI 0.88 to 2.43; P = 0.18). It also found no significant difference in clinical pregnancy
rates between the two groups (43/191 [23%] with unstimulated IUI v 33/193 [17%] with expectant
[98]
management; OR 1.41, 96% CI 0.73 to 2.74; P = 0.23).
Unstimulated IUI versus clomifene:
See benefits of clomifene.
Unstimulated IUI versus in vitro fertilisation (IVF):
We found one systematic review (search date 2005) which identified one three-armed RCT (258
[99]
couples randomised) comparing unstimulated IUI versus IVF versus stimulated IUI.
It found no
significant difference in the live birth rate per woman/couple between IVF and IUI after six cycles
(24/59 [41%] with IVF v 14/54 [26%] with unstimulated IUI; OR 1.96, 95% CI 0.88 to 4.36; P = 0.1).
[99]
The systematic review provided no data on clinical pregnancy from this RCT (see comment).
[99]
The review concluded that any effect of IVF relative to IUI with or without ovarian stimulation in
terms of live birth rates for couples with unexplained subfertility remains unknown. The trial included
in the review was limited by small sample size such that clinically significant differences cannot be
ruled out.
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32
Women's health
Female infertility
Unstimulated IUI versus stimulated IUI:
See benefits of stimulated IUI.
Harms:
Unstimulated IUI versus expectant management:
The subsequent RCT found no significant difference between unstimulated IUI and expectant
management in the risk of miscarriage or multiple pregnancy after 6 months (miscarriage: 9/55
[16%] with unstimulated IUI v 14/46 [30%] with expectant management; OR 0.45, 95% CI 0.13 to
1.56; P = 0.1; multiple pregnancy: 1/193 [1%] with unstimulated IUI v 2/193 [1%] with expectant
[98]
management; OR 0.05, 95% CI 0.02 to 11.92; P = 1.0).
Unstimulated IUI versus clomifene:
See harms of clomifene.
Unstimulated IUI versus IVF:
The systematic review gave no information on adverse effects.
[99]
Unstimulated IUI versus stimulated IUI:
See harms of stimulated IUI.
Comment:
OPTION
Unstimulated IUI versus expectant management:
[108]
that identified four RCTs as it was not a systematic review although
We excluded one review
it included a meta-analysis. One of the RCTs included in the meta-analysis was excluded by the
[107]
earlier systematic review
because it did not present data per woman, and only reported biochemical pregnancies. Moreover, there was significant heterogeneity among the population within
[108]
the included studies.
INTRAUTERINE INSEMINATION COMBINED WITH GONADOTROPHINS OR CLOMIFENE IN
UNEXPLAINED FERTILITY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . New
Live birth rate
Compared with unstimulated intrauterine insemination (IUI) IUI cycles stimulated with clomifene or gonadotrophins
are more effective at increasing live birth rate after up to six treatment cycles (high-quality evidence).
Compared with in vitro fertilisation (IVF) Stimulated IUI and IVF seem to be equally effective at increasing live birth
rate (moderate-quality evidence).
Pregnancy rate
Compared with expectant management We don't know whether IUI cycles stimulated with clomifene are more effective
than expectant management at increasing clinical pregnancy rate in women with unexplained infertility (low-quality
evidence).
Compared with clomifene We don't know whether clomifene-stimulated IUI or clomifene plus timed intercourse is
more effective at increasing clinical pregnancy rate in women with unexplained infertility (low-quality evidence).
Compared with unstimulated IUI IUI cycles stimulated with clomifene or gonadotrophins may be more effective at
increasing clinical pregnancy rate (high-quality evidence). Note: Stimulated intrauterine insemination may increase
ovarian hyperstimulation syndrome and multiple pregnancies.
For GRADE evaluation of interventions for female infertility, see table.
Benefits:
Stimulated intrauterine insemination (IUI) versus expectant management:
We found one systematic review (search date 2005), which found one RCT (67 women with unexplained infertility and endometriosis randomised, 51 women analysed, duration of infertility 1–3.5
[107]
It found no significant difference between stimulated
years and up to 8 treatment cycles each).
IUI and expectant management (timed intercourse in a natural cycle) after all cycles (pregnancy
rate per couple after number of cycles: 8/23 [35%] after 73 cycles with stimulated IUI v 4/28 [14%]
after 103 cycles with expectant management; OR 3.20, 95% CI 0.82 to 12.50; P = 0.09). The RCT
[107]
identified by the review did not report on live birth rate for this comparison.
Stimulated IUI versus clomifene:
We found one systematic review (search date 2005) comparing stimulated IUI (using clomifene,
gonadotrophins, or clomifene plus gonadotrophins) versus timed intercourse using stimulated cycles
[107]
(by the same regimen).
Subgroup analysis comparing clomifene-stimulated IUI versus clomifene
plus timed intercourse found no significant difference in clinical pregnancy rates between groups
(1 RCT, 40 couples with unexplained infertility: 1/17 [6%] with clomifene-stimulated IUI v 4/23 [17%]
[107]
with clomifene plus timed intercourse only; OR 0.30, 95% CI 0.03 to 2.93; P = 0.3).
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33
Women's health
Female infertility
Stimulated IUI versus unstimulated IUI:
We found one systematic review (search date 2005, 4 RCTs, 396 couples with unexplained infertility) comparing clomifene or gonadotrophins plus IUI (stimulated IUI) with unstimulated IUI for up
[107]
to six cycles.
It found that stimulated IUI significantly increased live birth rate compared with
unstimulated IUI after all cycles (50/202 [25%] with stimulated IUI v 27/194 [14%] with unstimulated
[107]
IUI; OR 2.07, 95% CI 1.22 to 3.50; P = 0.006).
It found that stimulated IUI significantly increased
clinical pregnancy rate compared with unstimulated IUI after all treatment cycles (51/202 [25%]
with stimulated IUI v 27/194 [14%] with unstimulated IUI; OR 2.14, 95% CI 1.26 to 3.61; P = 0.004).
[107]
Stimulated IUI versus IVF:
We found one systematic review (search date 2005), which identified one three-armed RCT (258
couples randomised) comparing stimulated IUI versus in vitro fertilisation (IVF) versus unstimulated
[99]
IUI.
It found no significant difference between IVF and stimulated IUI in live birth rates (24/59
[41%] with IVF v 22/59 [37%] with stimulated IUI; OR 1.15, 95% CI 0.55 to 2.4). The systematic
review provided no data on clinical pregnancy from this RCT and concluded that any effect of IVF
relative to IUI with or without ovarian stimulation in terms of live birth rates for couples with unex[99]
The study was limited by small sample size such that it
plained subfertility remains unproven.
was not possible to exclude clinically significant differences.
Harms:
Stimulated IUI versus expectant management:
The systematic review reported no multiple pregnancies and no cases of ovarian hyperstimulation
syndrome (OHSS) in the identified RCT. The RCT did not report on miscarriage rates or ectopic
[107]
pregnancies.
The authors of the review commented that there were insufficient data to investigate whether adverse effects (including multiple pregnancies, miscarriage, ectopic pregnancies,
[107]
and OHSS) were associated with stimulated or unstimulated IUI.
Stimulated IUI versus clomifene:
The review found no significant difference in multiple pregnancies between clomifene-stimulated
IUI and clomifene plus timed intercourse (1 RCT: multiple pregnancies: 0/17 [0%] with IUI plus
[107]
clomifene v 1/23 [4%] with timed intercourse plus clomifene; OR 0.43, 95% CI 0.02 to 11.18).
However, the authors of the review commented that there were insufficient data to investigate
whether adverse effects (including multiple pregnancies, miscarriage, ectopic pregnancies, and
[107]
OHSS) were associated with stimulated or unstimulated IUI.
Stimulated IUI versus unstimulated IUI:
The review found no significant difference in multiple pregnancies, miscarriage, or ectopic pregnancy
rate between clomifene-stimulated IUI and unstimulated IUI (multiple pregnancies: 2 RCTs: 1/30
[3%] with stimulated IUI v 0/35 [0%] with unstimulated IUI; OR 3.00, 95% CI 0.11 to 78.27; miscarriage: 1 RCT: 1/10 [10%] with stimulated IUI v 0/16 [0%] with unstimulated IUI; OR 5.21, 95% CI
0.19 to 141.08; ectopic pregnancy: 3 RCTs: 3/141 [2%] with stimulated IUI v 0/135 [0%] with un[107]
stimulated IUI; OR 6.48, 95% CI 0.33 to 127.09).
However, the authors of the review commented
that there were insufficient data to investigate whether adverse effects (including multiple pregnancies, miscarriage, ectopic pregnancies, and OHSS) were associated with stimulated or unstimulated
[107]
IUI.
Stimulated IUI versus IVF:
The review found no significant increase in multiple pregnancies with IVF compared with stimulated
IUI (12/59 [20%] with IVF v 17/59 [29%] with stimulated IUI; OR 0.63, 95% CI 0.27 to 1.47; P = 0.3).
[99]
It also found no significant difference in the incidence of OHSS per woman with IVF compared
with stimulated IUI (3/59 [5%] with IVF v 2/59 [3%] with stimulated IUI; OR 1.53, 95% CI 0.25 to
[99]
9.49).
Comment:
OPTION
None.
IN VITRO FERTILISATION AND EMBRYO TRANSFER (IVF-ET) IN UNEXPLAINED FERTILITY.
N
e
w
Live birth rate
Compared with expectant management In vitro fertilisation (IVF) seems more effective at increasing live birth rate
in women with unexplained infertility, however, evidence is insufficient to make any conclusions (moderate-quality
evidence).
Compared with stimulated intrauterine insemination (IUI) We don't know whether IVF or stimulated IUI is more effective
at increasing live birth rate, because evidence is insufficient to make any conclusions (moderate-quality evidence).
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34
Women's health
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Compared with unstimulated IUI We don't know whether IVF or unstimulated IUI is more effective at increasing live
birth rate, because evidence is insufficient to make any conclusions (moderate-quality evidence).
Pregnancy rate
Compared with placebo or expectant management IVF seems more effective than expectant management at increasing
pregnancy rates in women with unexplained infertility (moderate-quality evidence).
For GRADE evaluation of interventions for female infertility, see table.
Benefits:
In vitro fertilisation (IVF) versus placebo or expectant management:
[99]
We found one systematic review (search date 2004, 2 RCTs).
The systematic review found
that IVF significantly increased live birth rates compared with expectant management (1 RCT, 51
women: 11/24 [46%] with IVF v 1/27 [4%] with expectant management; OR 22.0, 95% CI 2.56 to
189.37). It found that IVF significantly increased clinical pregnancy rates compared with expectant
management (2 RCTs, 86 women: 13/45 [29%] with IVF v 5/41 [12%] with expectant management;
[99]
OR 3.24, 95% CI 1.07 to 9.80).
The review concluded that any effect of IVF relative to expectant
management, clomifene citrate, and IUI with or without ovarian stimulation in terms of live birth
rates for couples with unexplained subfertility remains unknown. The included RCTs were limited
by their small sample size so that even large differences might be hidden. The review also commented on unequal follow-up between groups in the included RCTs — one RCT compared a single
cycle of IVF treatment with 6 months of expectant management, the other RCT compared one cycle
of IVF and 3 months of expectant management.
IVF versus unstimulated IUI:
See benefits of IUI.
IVF versus stimulated IUI:
See benefits of IUI combined with gonadotrophins or clomifene.
IVF versus clomifene:
See benefits of clomifene.
Harms:
IVF versus expectant management:
[99]
The review gave no information on adverse effects.
IVF is known to be associated with several potential complications, including ovarian hyperstimulation syndrome (OHS) and multiple pregnancy. For information from observational studies on the
risk of breast cancer and perinatal adverse effects with IVF see comment below.
IVF versus unstimulated IUI:
See harms of IUI.
IVF versus stimulated IUI:
See harms of IUI combined with gonadotrophins or clomifene.
IVF versus clomifene:
See harms of clomifene.
Comment:
Although a Cochrane systematic review for the effectiveness of IVF in unexplained infertility failed
to provide data from RCTs as regard most IVF complications, IVF is known to be associated with
several potential complications. Multiple pregnancy rate (including twins and triplets) associated
[109]
with IVF is approximately 21%.
Ovarian hyperstimulation syndrome (OHSS), a potentially lifethreatening adverse effect of ovulation induction, is another known complication of this treatment.
Breast cancer We found one systematic review, which presented a combined analysis of cohort
studies (60,050 women treated with ovulation induction/IVF). It found no significant association
between IVF treatments and increased risk of breast cancer (601 with observed v 568 with expected;
RR 1.06; P = 0.337). Combined analysis of case-control studies (11,303 women in the breast
cancer groups and 10,930 controls). Women in the breast cancer groups were slightly but not significantly less likely to have received IVF (2.2% with breast cancer v 2.5% with no breast cancer;
[110]
RR 0.88; P = 0.231).
Perinatal adverse effects (in singleton pregnancies) We found one systematic review (15
[111]
Compared
studies comprising 12,283 IVF and 1.9 million spontaneously conceived singletons).
with spontaneous conceptions, IVF singleton pregnancies were associated with significantly higher
odds of each of the perinatal outcomes examined: perinatal mortality (OR 2.2, 95% CI 1.6 to 3.0),
preterm delivery (OR 2.0, 95% CI 1.7 to 2.2), low birth weight (OR 1.8, 95% CI 1.4 to 2.2), very
low birth weight (OR 2.7, 95% CI 2.3 to 3.1), and small for gestational age (OR 1.6, 95% CI 1.3 to
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35
Women's health
Female infertility
2.0). Statistical heterogeneity was noted only for preterm delivery and low birth weight. Sensitivity
analyses showed no significant changes in results. Early preterm delivery, spontaneous preterm
delivery, placenta previa, gestational diabetes, preeclampsia, and neonatal intensive care admission
[111]
were also significantly more prevalent in the IVF group.
GLOSSARY
Delayed in vitro fertilisation In vitro fertilisation treatment after 6 months of being assessed in an infertility clinic
after at least 12 months of infertility.
Gonadotrophin priming of oocytes This is the in vitro maturation of oocytes using gonadotrophins (hormones
stimulate and control reproductive activity) from the germinal vesicle (early) stage of development to the metaphase
II (mature) stage.
Hydrosalpinges is the abnormal distension of one or both fallopian tubes owing to fluid build up, usually because
of inflammation.
Hydrotubation Flushing of the fallopian tubes through the cervix and uterine cavity to remove surgical debris and
reduce the incidence of tubal reocclusion.
Immediate in vitro fertilisation In vitro fertilisation treatment within 6 months of being assessed in an infertility
clinic after at least 12 months of infertility.
In vitro fertilisation (IVF) is a technique where female oocytes (eggs) are fertilised with sperm from a male partner
outside the body in a fluid medium in the laboratory. Embryos are transferred later to the uterus using a special
catheter.
Macrosurgery Surgery without dedicated optical magnification.
Microsurgery Surgery involving optical magnification to allow the use of much finer instruments and suture material
in addition to a non-touch technique, with the aim of minimising tissue handling and damage.
Polycystic ovary syndrome (PCOS) results from an accumulation of incompletely developed follicles in the ovaries
owing to chronic anovulation. PCOS is characterised by irregular or absent menstrual cycles, multiple small cysts
on the ovaries (polycystic ovaries), mild hirsutism, and infertility. Many women also have increased insulin resistance.
Salpingography is a technique used to diagnose blockages in the fallopian tubes. It involves the radiographic
imaging of the fallopian tubes after the injection of radio-opaque contrast medium (dye) through the cervix to the
uterine cavity. If the fallopian tubes are open the dye flows into the tubes and then spills out to the abdominal cavity.
This is documented in a series of x-ray images during the procedure. If tubes are blocked from the proximal end, a
very narrow catheter is introduced under radiographic imaging (selective salpingography and tubal catheterisation)
to remove the obstruction if possible.
Second look laparoscopy Laparoscopy performed some time after tubal surgery (either open or laparoscopic) with
the aim of dividing adhesions relating to the initial procedure.
Tubal infertility is the inability to conceive owing to a blockage in one or both fallopian tubes and is a common cause
of infertility. The tubal blockages are usually caused either by pelvic infection, such as pelvic inflammatory disease
(PID) or endometriosis. Blockages may also be caused by scar tissue that forms after pelvic surgery.
Tubal surgery techniques are used to restore the patency of the fallopian tubes in women with tubal infertility as an
alternative to in vitro fertilisation. Surgery may either be open microsurgery or laparoscopic microsurgery.
Anovulation is the failure to ovulate (expel a mature oocyte) owing to dysfunction of the ovary or suppression by
drug treatment. Anovulation is a common cause of female infertility. Most often, women who do not ovulate also do
not menstruate (amenorrhoea).
Assisted hatching procedure Assisted hatching is a process to breach the zona pellucida of an embryo, by either
laser or chemical processes, potentially to improve its implantation potential.
Endometriosis is a progressive disease that occurs when the endometrial tissue lining the uterus grows outside
the uterus and attaches to the ovaries, fallopian tubes, or other organs in the abdominal cavity. Symptoms include
painful menstrual periods, abnormal menstrual bleeding, and pain during or after sexual intercourse.
High-quality evidence Further research is very unlikely to change our confidence in the estimate of effect.
Long agonist protocol is the most widely used protocol for an in vitro fertilisation (IVF) cycle, which involves starting
the gonadotrophin-releasing hormone (GnRH) agonist usually on the 21st day of the menstrual cycle. Ovarian stimulation with follicle-stimulating hormone (FSH) then starts a couple of days after the onset of menstruation.
Low-quality evidence Further research is very likely to have an important impact on our confidence in the estimate
of effect and is likely to change the estimate.
Moderate-quality evidence Further research is likely to have an important impact on our confidence in the estimate
of effect and may change the estimate.
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36
Women's health
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Ovarian hyperstimulation syndrome (OHSS) can occur in mild, moderate, and severe forms. Mild ovarian hyperstimulation syndrome is characterised by fluid accumulation, as shown by weight gain, abdominal distension, and
discomfort. Moderate ovarian hyperstimulation syndrome is associated with nausea and vomiting, ovarian enlargement,
abdominal distension, discomfort, and dyspnoea. Severe ovarian hyperstimulation syndrome is a life-threatening
condition, in which there is contraction of the intravascular volume, tense ascites, pleural and pericardial effusions,
severe haemoconcentration, and the development of hepatorenal failure. Deaths have occurred, caused usually by
cerebrovascular thrombosis, renal failure, or cardiac tamponade.
Ovulation disorders are defined by the failure of an ovum to be expelled owing to a malfunction in the ovary. Ovulation disorders are a major cause of infertility and can often be corrected with medication. Ovulation disorders often
result in infrequent menstruation (oligomenorrhoea).
Pituitary downregulation (long protocol) This is the process by which the release of gonadotrophins from the pituitary gland is stopped after repeated administration of gonadotrophin-releasing hormone (GnRH) analogues; this
in turn controls reproductive function.
Pulsatile gonadotrophin-releasing hormone is a hormone produced and released by the hypothalamus at intervals
(pulses). Pulsatile gonadotrophin-releasing hormone controls the production and release of gonadotrophins from
the pituitary gland, which in turn controls reproductive function.
Tubal flushing involves injecting an oil or water soluble contrast medium into the fallopian tubes to flush out any
blockages in the tubes. Flushing out any tubal “plugs” that may be causing proximal tubal occlusion using oil or water
soluble media may have a fertility enhancing effect.
Very low-quality evidence Any estimate of effect is very uncertain.
REFERENCES
1.
European Society for Human Reproduction and Embryology. Guidelines to the
prevalence, diagnosis, treatment and management of infertility, 1996. Hum Reprod
1996;11:1775–1807.
21.
Ben Ayed B, Dammak dit Mlik S, Ben Arab H, et al. Metformin effects on
clomifene-induced ovulation in the polycystic ovary syndrome. Tunis Med
2009;87:43–49.[PubMed]
2.
Cahill DJ, Wardle PG. Management of infertility. BMJ 2002;325:28–32.[PubMed]
22.
3.
Liu J, Larsen U, Wyshak G. Prevalence of primary infertility in China: in-depth
analysis of infertility differentials in three minority province/autonomous regions.
J Biosoc Sci 2005;37:55–74.
Suginami H, Kitagawa H, Nakahashi N, et al. A clomiphene citrate and tamoxifen
citrate combination therapy: a novel therapy for ovulation induction. Fertil Steril
1993;59:976–979.[PubMed]
23.
4.
Lunenfeld B, Van Steirteghem A; Bertarelli Foundation. Infertility in the third millennium: implications for the individual, family and society: condensed meeting
report from the Bertarelli Foundation's second global conference. Hum Reprod
Update 2004;10:317–326.[PubMed]
Tso LO, Costello MF, Albuquerque LE, et al. Metformin treatment before and
during IVF or ICSI in women with polycystic ovary syndrome. In: The Cochrane
Library, Issue 4, 2009. Chichester, UK: John Wiley & Sons, Ltd. Search date
2008.
24.
5.
Isaksson R, Tiitinen A. Present concept of unexplained infertility. Gynecol Endocrinol 2004;18:278–290.[PubMed]
6.
Effective Health Care. The management of subfertility. Effective Health Care Bull
1992;3:13. Search date not reported.
Nugent D, Vandekerckhove P, Hughes E, et al. Gonadotrophin therapy for ovulation induction in subfertility associated with polycystic ovary syndrome. In: The
Cochrane Library, Issue 4, 2009. Chichester, UK: John Wiley & Sons, Ltd. Search
date not reported.
25.
7.
Brosens I, Gordts S, Valkenburg M, et al. Investigation of the infertile couple:
when is the appropriate time to explore female infertility? Hum Reprod
2004;19:1689–1692.[PubMed]
Costello MF, Chapman M, Conway U. A systematic review and meta-analysis
of randomized controlled trials on metformin co-administration during gonadotrophin ovulation induction or IVF in women with polycystic ovary syndrome.
Hum Reprod 2006;21:1387–1399.[PubMed]
8.
Templeton A, Morris JK. IVF – factors affecting outcome. In: Templeton A, Cooke
ID, O'Brien PMS, eds. 35th RCOG study group evidence-based fertility treatment.
London: RCOG Press, 1998:265–273.
26.
Moll E, van der Veen F, van Wely M. The role of metformin in polycystic ovary
syndrome: a systematic review. Hum Reprod Update 2007;13:527–537.[PubMed]
27.
9.
Collins JA, Burrows EA, Willan AR. The prognosis for live birth among untreated
infertile couples. Fertil Steril 1995;64:22–28.[PubMed]
George K, Nair R, Tharyan P, et al. Ovulation triggers in anovulatory women
undergoing ovulation induction. In: The Cochrane Library, Issue 4, 2009. Chichester, UK: John Wiley & Sons, Ltd. Search date 2007.
10.
Khan KS, Daya S, Collins JA, et al. Empirical evidence of bias in infertility research: overestimation of treatment effect in crossover trials using pregnancy as
the outcome measure. Fertil Steril 1996;65:939–945.[PubMed]
28.
Farquhar C, Lilford RJ, Marjoribanks J, et al. Laparoscopic "drilling" by diathermy
or laser for ovulation induction in anovulatory polycystic ovary syndrome. In: The
Cochrane Library, Issue 4, 2009. Chichester, UK: John Wiley & Sons, Ltd. Search
date 2007.
11.
Cohlen BJ, Te Velde ER, Looman CW, et al. Crossover or parallel design in infertility trials? The discussion continues. Fertil Steril 1998;70:40–45.[PubMed]
29.
12.
Brown J, Farquhar C, Beck J, et al. Clomiphene and anti-oestrogens for ovulation
induction in PCOS. In: The Cochrane Library, Issue 4, 2009. Chichester, UK:
John Wiley & Sons, Ltd. Search date 2009.
Albuquerque LE, Saconato H, Maciel MC. Depot versus daily administration of
gonadotrophin releasing hormone agonist protocols for pituitary desensitization
in assisted reproduction cycles. In: The Cochrane Library, Issue 4, 2009. Chichester, UK: John Wiley & Sons, Ltd. Search date 2004.
30.
13.
Buvat J, Buvat-Herbaut M, Marcolin G, et al. Antiestrogens as treatment of female
and male infertilities. Horm Res 1987;28:219–229.[PubMed]
14.
Amer SA, Li TC, Metwally M, et al. Randomized controlled trial comparing laparoscopic ovarian diathermy with clomiphene citrate as a first-line method of ovulation
induction in women with polycystic ovary syndrome. Human Reprod
2009;24:219–225.[PubMed]
Hughes E, Collins J, Vandekerckhove P. Gonadotrophin-releasing hormone
analogue as an adjunct to gonadotropin therapy for clomiphene-resistant polycystic ovarian syndrome (Cochrane Review). In: The Cochrane Library, Issue 1,
2004. Chichester, UK: John Wiley & Sons, Ltd. Search date not reported. [Review
withdrawn from the Internet].
31.
Griesinger G, Diedrich K, Tarlatzis BC, et al. GnRH-antagonists in ovarian stimulation for IVF in patients with poor response to gonadotrophins, polycystic ovary
syndrome, and risk of ovarian hyperstimulation: a meta-analysis. Reprod Biomed
Online 2006;13:628–638.[PubMed]
32.
Kolibianakis EM, Collins J, Tarlatzis BC, et al. Among patients treated for IVF
with gonadotrophins and GnRH analogues, is the probability of live birth dependent on the type of analogue used? A systematic review and meta-analysis. Hum
Reprod Update 2006;12:651–671.[PubMed]
33.
Malkawi HY, Qublan HS, Hamaideh AH. Medical vs. surgical treatment for
clomiphene citrate-resistant women with polycystic ovary syndrome. J Obstet
Gynaecol 2003;23:289–293.[PubMed]
34.
Greenblatt E, Casper R. Adhesion formation after laparoscopic ovarian cautery
for polycystic ovarian syndrome: lack of correlation with pregnancy rates. Fertil
Steril 1993;60:766–770.[PubMed]
35.
Deans A, Wayne C, Toplis P. Pelvic infection: a complication of laparoscopic
ovarian drilling. Gynaecol Endoscopy 1997;6:301–303.
36.
Api M. Is ovarian reserve diminished after laparoscopic ovarian drilling? Gynecol
Endocrinol 2009;25:159–165.[PubMed]
37.
Bayram N, Van Wely M, van der Veen F. Pulsatile gonadotrophin releasing hormone for ovulation induction in subfertility associated with polycystic ovary syndrome. In: The Cochrane Library, Issue 4, 2009. Chichester, UK: John Wiley &
Sons, Ltd. Search date 2003.
15.
Thessaloniki ESHRE/ASRM-Sponsored PCOS Consensus Workshop Group.
Consensus on infertility treatment related to polycystic ovary syndrome. Fertil
Steril 2008;89:505–522.[PubMed]
16.
Myers ER, McCrory DC, Mills AA, et al. Effectiveness of assisted reproductive
technology (ART). Evid Rep Technol Assess 2008;1–195.[PubMed]
17.
Ness RBC. Infertility, fertility drugs, and ovarian cancer: a pooled analysis of
case-control studies. Am J Epidemiol 2002;155:217–224.[PubMed]
18.
Practice Committee of the American Society for Reproductive Medicine. Use of
clomiphene citrate in women.Fertil Steril 2006;86:S187–S193.[PubMed]
19.
Tang T, Lord JM, Norman RJ, et al. Insulin-sensitising drugs (metformin, rosiglitazone, pioglitazone, D-chiro-inositol) for women with polycystic ovary syndrome,
oligo amenorrhoea and subfertility. In: The Cochrane Library, Issue 4, 2009.
Chichester, UK: John Wiley & Sons, Ltd. Search date 2008.
20.
Palomba S, Pasquali R, Orio F, et al. Clomiphene citrate, metformin or both as
first-step approach in treating anovulatory infertility in patients with polycystic
ovary syndrome (PCOS): a systematic review of head-to-head randomized controlled studies and meta-analysis. Clin Endocrinol (Oxf)
2009;70:311–321.[PubMed]
© BMJ Publishing Group Ltd 2010. All rights reserved.
..........................................................
This information is made available to subscribers of ConsumerReportsHealth.org to facilitate discussion with their health-care providers
37
Women's health
Female infertility
38.
Braat DD, Schoemaker R, Schoemaker J. Life table analysis of fecundity in intravenously gonadotropin-releasing hormone-treated patients with normogonadotropic and hypogonadotropic amenorrhea. Fertil Steril 1991;55:266–271.[PubMed]
70.
Duffy JM, Johnson N, Ahmad G, et al. Postoperative procedures for improving
fertility following pelvic reproductive surgery. In: The Cochrane Library, Issue 4,
2009. Chichester, UK: John Wiley & Sons, Ltd. Search date 2008.
39.
Filicori M, Flamigni C, Dellai P, et al. Treatment of anovulation with pulsatile gonadotropin-releasing hormone: prognostic factors and clinical results in 600 cycles.
J Clin Endocrinol Metab 1994;79:1215–1220.[PubMed]
71.
Jarrell J, Labelle R, Goeree R, et al. In vitro fertilization and embryo transfer: a
randomized controlled trial. Online J Curr Clin Trials 1993;2:Doc 73.[PubMed]
72.
40.
Balen AH, Braat DD, West C, et al. Cumulative conception and live birth rates
after the treatment of anovulatory infertility: safety and efficacy of ovulation induction in 200 patients. Hum Reprod 1994;9:1563–1570.[PubMed]
van Rumste MME, Evers JLH, Farquhar CM. Intra-cytoplasmic sperm injection
versus conventional techniques for oocyte insemination during in vitro fertilisation
in patients with non-male subfertility. In: The Cochrane Library, Issue 4, 2009.
Chichester, UK: John Wiley & Sons, Ltd. Search date 2002.
41.
Heijnen EM, Eijkemans MJ, Hughes EG, et al. A meta-analysis of outcomes of
conventional IVF in women with polycystic ovary syndrome. Hum Reprod Update
2006;12:13–21.[PubMed]
73.
Bhattacharya S, Hamilton MP, Shaaban M, et al. Conventional in-vitro fertilisation
versus intracytoplasmic sperm injection for the treatment of non-male-factor infertility: a randomised controlled trial. Lancet 2001;357:2075–2079.[PubMed]
42.
Kosmas IP, Tatsioni A, Fatemi HM, et al. Human chorionic gonadotropin administration vs. luteinizing monitoring for intrauterine insemination timing, after administration of clomiphene citrate: a meta-analysis. Fertil Steril
2007;87:607–612.[PubMed]
74.
Human Fertilisation & Embryology Authority. Fertility facts and figures 2007.
September 2009. http://www.hfea.gov.uk/docs/adbcdfh.pdf (last accessed 22
October 2010).
75.
43.
Mikkelsen AL, Lindenberg S. Benefit of FSH priming of women with PCOS to the
in vitro maturation procedure and the outcome: a randomized prospective study.
Reproduction 2001;122:587–592.[PubMed]
Human Fertilisation and Embryology Authority. http://www.hfea.gov.uk (last accessed 22 October 2010).
76.
Sunderam S, Chang J. Assisted reproductive technology surveillance - United
States, 2006. MMWR Surveill Summ 2009;58:1–25.[PubMed]
77.
Centers for Disease Control and Prevention. US Department of Health and Human
Services, 1998. Assisted reproductive technology success rates. National summary and clinic reports. December 2000.
78.
Chapko KM, Weaver MR, Chapko MK, et al. Stability of in vitro fertilization-embryo
transfer success rates from the 1989, 1990, and 1991 clinic-specific outcome
assessments. Fertil Steril 1995;64:757–763. Search date not reported.[PubMed]
79.
Human Fertilisation and Embryology Authority. The patients' guide to IVF clinics.
London: HFEA, 2000.
80.
Brinsden PR, Wada I, Tan SL, et al. Diagnosis, prevention and management of
ovarian hyperstimulation syndrome. Br J Obstet Gynaecol
1995;102:767–772.[PubMed]
81.
Balen A. Ovarian hyperstimulation syndrome (OHSS): a short report for the HFEA,
August 2008. http://www.hfea.gov.uk/docs/OHSS_UPDATED_Report_from_Adam_Balen_2008.pdf (last accessed 22 October 2010).
82.
Wennerholm U, Bergh C. 11844355 Hum Fertil 2000;3:52–64. Search date
1998.[PubMed]
83.
Hughes E, Brown J, Collins JJ, et al. Ovulation suppression for endometriosis.
In: The Cochrane Library, Issue 4, 2009. Chichester, UK: John Wiley & Sons,
Ltd. Search date 2009.
84.
Tummon IS, Asher LJ, Martin JSB, et al. Randomized controlled trial of superovulation and insemination for infertility associated with minimal or mild endometriosis.
Fertil Steril 1997;68:8–12.[PubMed]
85.
Nulsen JC, Walsh S, Dumez S. A randomised and longitudinal study of human
menopausal gonadotrophin with intrauterine insemination in the treatment of infertility. Obstet Gynaecol 1993;82:780–786.[PubMed]
86.
Deaton JL, Gibson M, Blackmer KM, et al. A randomized, controlled trial of
clomiphene citrate and intrauterine insemination in couples with unexplained infertility or surgically corrected endometriosis. Ferti Steril
1990;54:1083–1088.[PubMed]
44.
Siristatidis CS, Maheshwari A, Bhattacharya S, et al. In vitro maturation in sub
fertile women with polycystic ovarian syndrome undergoing assisted reproduction.
In: The Cochrane Library, Issue 4, 2009. Chichester, UK: John Wiley & Sons,
Ltd. Search date 2007.
45.
Lin YH, Hwang JL, Huang LW, et al. Combination of FSH priming and hCG
priming for in-vitro maturation of human oocytes. Hum Reprod
2003;18:1632–1636.[PubMed]
46.
Cha KY, Chian RC. Maturation in vitro of immature human oocytes for clinical
use. Hum Reprod Update 1998;4:103–120.[PubMed]
47.
Chian RC, Buckett WM, Tulandi T, et al. Prospective randomized study of human
chorionic gonadotrophin priming before immature oocyte retrieval from unstimulated women with polycystic ovarian syndrome. Hum Reprod
2000;15:165–170.[PubMed]
48.
Honore GM, Holden AE, Schenken RS. Pathophysiology and management of
proximal tubal blockage. Fertil Steril 1999;71:785–795. Search date not reported.[PubMed]
49.
Marana R. Proximal tubal obstruction: are we overdiagnosing and overtreating?
Gynaecol Endoscopy 1992;1:99–101.
50.
Thurmond AS. Pregnancies after selective salpingography and tubal recanalization. Radiology 1994;190:11–13.[PubMed]
51.
Johnson N, Vandekerckhove P, Watson A, et al. Tubal flushing for subfertility.
In: The Cochrane Library, Issue 4, 2009. Chichester, UK: John Wiley & Sons,
Ltd. Search date 2007.
52.
Lindborg L, Thorburn J, Bergh C, et al. Influence of HyCoSy on spontaneous
pregnancy: a randomized controlled trial. Hum Reprod
2009;24:1075–1079.[PubMed]
53.
Ahmad G, Watson A, Vandekerckhove P, et al. Techniques for pelvic surgery in
subfertility. In: The Cochrane Library, Issue 4, 2009. Chichester, UK: John Wiley
& Sons, Ltd. Search date 2005.
54.
Pandian Z, Akande VA, Harrild K, et al. Surgery for tubal infertility. In: The
Cochrane Library, Issue 4, 2009. Chichester, UK: John Wiley & Sons, Ltd. Search
date 2007.
87.
Jacobson TZ, Barlow DH, Koninckx PR, et al. Laparoscopic surgery for subfertility associated with endometriosis. In: The Cochrane Library, Issue 4, 2009.
Chichester, UK: John Wiley & Sons, Ltd. Search date 2001.
55.
Johnson NP, Mak W, Sowter MC. Surgical treatment for tubal disease in women
due to undergo in vitro fertilisation. In: The Cochrane Library, Issue 4, 2009.
Chichester, UK: John Wiley & Sons, Ltd. Search date 2004.
88.
Tsoumpou I, Kyrgiou M, Gelbaya TA, et al. The effect of surgical treatment for
endometrioma on in vitro fertilization outcomes: a systematic review and metaanalysis. Fertil Steril 2009;92:75–87.[PubMed]
56.
Kontoravdis A, Makrakis E, Pantos K, et al. Proximal tubal occlusion and salpingectomy result in similar improvement in in vitro fertilization outcome in patients
with hydrosalpinx. Fertil Steri 2006;86:1642–1649.[PubMed]
89.
Hart RJ, Hickey M, Maouris P, et al. Excisional surgery versus ablative surgery
for ovarian endometriomata. In: The Cochrane Library, Issue 4, 2009. Chichester,
UK: John Wiley & Sons, Ltd. Search date 2007.
57.
Holst N, Maltau JM, Forsdahl F. Handling of tubal infertility after introduction of
in vitro fertilization: changes and consequences. Fertil Steril
1991;55:140–143.[PubMed]
90.
Gupta S, Agarwal A, Agarwal R, et al. Impact of ovarian endometrioma on assisted
reproduction outcomes. Reprod Biomed Online 2006;13:349–360.[PubMed]
58.
Vilos GA, Verhoest CR, Martin JS. Economic evaluation of in vitro fertilizationembryo transfer and neosalpingostomy for bilateral tubal obstruction. J Soc Obstet
Gynecol Can 1998;20:139–147.
91.
Barnhart K, Dunsmoor-Su R, Coutifaris C. Effect of endometriosis on in vitro
fertilization. Fertil Steril 2002;77:1148–1155. Search date 1999.[PubMed]
92.
Geber S, Paraschos T, Atkinson G, et al. Results of IVF in patients with endometriosis: the severity of the disease does not affect outcome or the incidence
of miscarriage. Hum Reprod 1995;10:1507–1511.[PubMed]
93.
Olivennes F, Feldberg D, Liu H-C, et al. Endometriosis: a stage by stage analysis
- the role of in vitro fertilization. Fertil Steril 1995;64:392–398.[PubMed]
94.
Sallam HN, Garcia-Velasco JA, Dias S, et al. Long-term pituitary down-regulation
before in vitro fertilization (IVF) for women with endometriosis. In: The Cochrane
Library, Issue 4, 2009. Chichester, UK: John Wiley & Sons, Ltd. Search date
2003.
59.
Winston RM, Margara RA. Microsurgical salpingostomy is not an obsolete procedure. Br J Obstet Gynaecol 1991;98:637–642.[PubMed]
60.
Singhal V, Li TC, Cooke ID. An analysis of factors influencing the outcome of
232 consecutive tubal microsurgery cases. Br J Obstet Gynaecol
1991;98:628–636.[PubMed]
61.
Marana R, Quagliarello J. Distal tubal occlusion: microsurgery versus in vitro
fertilization: a review. Int J Fertil 1988;33:107–115.[PubMed]
62.
Marana R, Quagliarello J. Proximal tubal occlusion: microsurgery versus IVF –
a review. Int J Fertil 1988;33:338–340.[PubMed]
95.
63.
Patton PE, Williams TJ, Coulam CB. Results of microsurgical reconstruction in
patients with combined proximal and distal occlusion: double obstruction. Fertil
Steril 1987;47:670–674.
Pabuccu R, Onalan G, Kaya C. GnRH agonist and antagonist protocols for stage
I-II endometriosis and endometrioma in in vitro fertilization/intracytoplasmic sperm
injection cycles. Fertil Steril 2007;88:832–839.[PubMed]
96.
64.
Filippini F, Darai E, Benifla JL, et al. Distal tubal surgery: a critical review of 104
laparoscopic distal tuboplasties. J Gynecol Obstet Biol Reprod 1996;25:471–478
[In French].[PubMed]
Johnson NP, Kwok R, Stewart AW, et al. Lipiodol fertility enhancement: two-year
follow-up of a randomized trial suggests a transient benefit in endometriosis, but
a sustained benefit in unexplained infertility. Hum Reprod
2007;22:2857–2862.[PubMed]
97.
65.
Donnez J, Casanas-Roux F. Prognostic factors of fimbrial microsurgery. Fertil
Steril 1986;46:200–204.[PubMed]
Hughes E, Collins J, Vandekerckhove P, et al. Clomiphene citrate for unexplained
subfertility in women. In: The Cochrane Library, Issue 4, 2009. Chichester, UK:
John Wiley & Sons, Ltd. Search date 2006.
66.
Tomazevic T, Ribic-Pucelj M, Omahen A, et al. Microsurgery and in vitro fertilization and embryo transfer for infertility resulting from pathological proximal tubal
blockage. Hum Reprod 1996;11:2613–2617.[PubMed]
98.
Bhattacharya S, Harrild K, Mollison J, et al. Clomifene citrate or unstimulated intrauterine insemination compared with expectant management for unexplained
infertility: pragmatic randomised controlled trial. BMJ 2008;337:a716.[PubMed]
67.
Wu CH, Gocial B. A pelvic scoring system for infertility surgery. Int J Fertil
1988;33:341–346.[PubMed]
99.
68.
Oelsner G, Sivan E, Goldenberg M, et al. Should lysis of adhesions be performed
when in vitro fertilization and embryo transfer are available? Hum Reprod
1994;9:2339–2341.[PubMed]
Pandian Z, Bhattacharya S, Vale L, et al. In vitro fertilisation for unexplained
subfertility. In: The Cochrane Library, Issue 4, 2009. Chichester, UK: John Wiley
& Sons, Ltd. Search date 2004
69.
Gillett WR, Clarke RH, Herbison GP. First and subsequent pregnancies after
tubal surgery: evaluation of the fertility index. Fertil Steril 1998;68:1033–1042.
100. Whittemore AS, Harris R, Itnyre J, et al. Characteristics relating to ovarian cancer
risk: collaborative analysis of 12 US case-control studies. II. Invasive epithelial
ovarian cancers in white women. Collaborative Ovarian Cancer Group. Am J
Epidemiol 1992;136:1184–1203.[PubMed]
101. Rossing MA, Daling JR, Weiss NS, et al. Ovarian tumours in a cohort of infertile
women. N Engl J Med 1994;331:771–776.[PubMed]
© BMJ Publishing Group Ltd 2010. All rights reserved.
..........................................................
This information is made available to subscribers of ConsumerReportsHealth.org to facilitate discussion with their health-care providers
38
Women's health
Female infertility
102. Silva Idos S, Wark PA, McCormack VA, et al. Ovulation-stimulation drugs and
cancer risks: a long-term follow-up of a British cohort. Br J Cancer
2009;100:1824–1831.[PubMed]
107. Verhulst SM, Cohlen BJ, Hughes E, et al. Intra-uterine insemination for unexplained subfertility. In: The Cochrane Library, Issue 4, 2009. Chichester, UK:
John Wiley & Sons, Ltd. Search date 2005.
103. Samsonia MD, Lesnovskaia EE, Kandelaki MA, et al. Clomiphene, ovarian hyperstimulation syndrome and pregnancy. Georgian Med News 2009;26–29. [In
Russian][PubMed]
108. ESHRE Capri Workshop Group. Intrauterine insemination. Hum Reprod Update
2009;15:265–277.[PubMed]
104. Jensen A, Sharif H, Frederiksen K, et al. Use of fertility drugs and risk of ovarian
cancer: Danish Population Based Cohort Study. BMJ 2009;338:b249.[PubMed]
109. de Mouzon J, Goossens V, Bhattacharya S, et al. Assisted reproductive technology in Europe, 2006: results generated from European registers by ESHRE. Hum
Reprod 2010;25:1851–1862.[PubMed]
105. Calderon-Margalit R, Friedlander Y, Yanetz R, et al. Cancer risk after exposure
to treatments for ovulation induction. Am J Epidemiol 2009;169:365–375.[PubMed]
110. Salhab M, Al Sarakbi W, Mokbel K. In vitro fertilization and breast cancer risk: a
review. Int J Fertil Womens Med 2005;50:259–266.[PubMed]
106. Elizur SE, Tulandi T. Drugs in infertility and fetal safety. Fertil Steril
2008;89:1595–1602.[PubMed]
111. Jackson RA, Gibson KA, Wu YW, et al. Perinatal outcomes in singletons following
in vitro fertilization: a meta-analysis. Obstet Gynecol 2004;103:551–563.[PubMed]
Disclaimer
The information contained in this publication is intended for medical professionals. Categories presented in Clinical Evidence indicate a
judgement about the strength of the evidence available to our contributors prior to publication and the relevant importance of benefit and
harms. We rely on our contributors to confirm the accuracy of the information presented and to adhere to describe accepted practices.
Readers should be aware that professionals in the field may have different opinions. Because of this and regular advances in medical research
we strongly recommend that readers' independently verify specified treatments and drugs including manufacturers' guidance. Also, the
categories do not indicate whether a particular treatment is generally appropriate or whether it is suitable for a particular individual. Ultimately
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39
Women's health
Female infertility
TABLE
GRADE evaluation of interventions for female infertility
Important outcomes
Number of studies
(participants)
Live birth rates, pregnancy rates, ovulation rates, adverse effects
Outcome
Comparison
Type
of evidence
Quality
Consistency
Directness
Effect
size
GRADE
Comment
What are the effects of treatments for infertility caused by ovulation disorders?
3 (133)
[12]
Pregnancy rate
Clomifene v placebo
4
–2
0
0
+2
High
Quality points deducted for sparse data and results
post-crossover. Effect size points added for OR >5
3 (133)
[12]
Ovulation rate
Clomifene v placebo
4
–2
0
0
+2
High
Quality points deducted for sparse data and results
post-crossover. Effects size point added for OR >5
Live birth rate
Clomifene v tamoxifen
4
–1
0
0
0
Moderate
Quality point deducted for sparse data
Pregnancy rate
Clomifene v tamoxifen
4
–1
0
0
0
Moderate
Quality point deducted for incomplete reporting of
results
1 (95)
[12]
3 (256)
[12]
[13]
1 (95)
[12]
Ovulation rate
Clomifene v tamoxifen
4
–1
0
0
0
Moderate
Quality point deducted for sparse data
1 (72)
[14]
Live birth rate
Clomifene v laparoscopic ovarian drilling
4
–1
0
–1
0
Low
Quality point deducted for sparse data. Directness
point deducted for additional treatments
1 (72)
[14]
Pregnancy rate
Clomifene v laparoscopic ovarian drilling
4
–1
0
–1
0
Low
Quality point deducted for sparse data. Directness
point deducted for additional treatments
1 (72)
[14]
Ovulation rate
Clomifene v laparoscopic ovarian drilling
4
–1
0
0
0
Moderate
Quality point deducted for sparse data
2 (50)
[19]
Live birth rate
Metformin v placebo
4
–2
0
0
0
Low
Quality points deducted for sparse data and low event
rate leading to wide confidence intervals
Pregnancy rate
Metformin v placebo
4
0
0
0
0
High
Ovulation rate
Metformin v placebo
4
0
0
0
0
High
6 (479)
[19]
13 (875)
[19]
3 (600)
[19]
[20]
Live birth rate
Metformin v clomifene
4
–1
0
0
0
Moderate
Quality point deducted for significant statistical heterogeneity in analysis
3 (600)
[19]
[20]
Pregnancy rate
Metformin v clomifene
4
–1
–1
0
0
Low
Quality point deducted for significant statistical heterogeneity in analysis. Consistency point deducted
for conflicting results
Ovulation rate
Metformin v clomifene
4
–1
–1
0
0
Low
Quality point deducted for significant statistical heterogeneity in analysis. Consistency point deducted
for conflicting results
3 (594 women, 2470
[19] [20]
cycles)
4 (752)
[19]
[20]
Live birth rate
Metformin plus clomifene v clomifene
alone
4
0
0
0
0
High
8 (976)
[19]
[20]
Pregnancy rate
Metformin plus clomifene v clomifene
alone
4
–1
–1
0
0
Low
Quality point deducted for significant statistical heterogeneity. Consistency point deducted for different
results between analyses
Ovulation rate
Metformin plus clomifene v clomifene
alone
4
–1
–1
0
0
Low
Quality point deducted for significant statistical heterogeneity. Consistency point deducted for different
results between analyses
12 (2700)
[21]
[19]
[20]
© BMJ Publishing Group Ltd 2010. All rights reserved.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
This information is made available to subscribers of ConsumerReportsHealth.org to facilitate discussion with their health-care providers
Women's health
Female infertility
Important outcomes
Number of studies
(participants)
Live birth rates, pregnancy rates, ovulation rates, adverse effects
Outcome
Comparison
Type
of evidence
Quality
Consistency
Directness
Effect
size
GRADE
Comment
7 (627)
[24]
Pregnancy rate
Urinary follicle-stimulating hormone v
hMG
4
–2
0
0
0
Low
Quality points deducted for methodological weaknesses in included studies (blinding and method of randomisation not reported)
7 (627)
[24]
Ovulation rate
Urinary follicle-stimulating hormone v
hMG
4
–2
0
0
0
Low
Quality points deducted for methodological weaknesses in included studies (blinding and method of randomisation not reported)
3 (122)
[26]
Live birth rate
Gonadotrophins plus metformin v gonadotrophins alone
4
–1
0
0
0
Moderate
Quality point deducted for sparse data
Pregnancy rate
Gonadotrophins plus metformin v gonadotrophins alone
4
–2
0
0
0
Low
Quality points deducted for sparse data and inclusion
of post-crossover results from one RCT
at least 4 (at least
[25] [26]
154)
2 (305)
[27]
Live birth rate
Urinary hCG plus clomifene citrate v
clomifene citrate alone
4
–2
0
0
0
Low
Quality points deducted for methodological weakness
in included RCTs (underpowered and no blinding)
2 (305)
[27]
Pregnancy rate
Urinary hCG plus clomifene citrate v
clomifene citrate alone
4
–2
0
0
0
Low
Quality points deducted for methodological weakness
in one RCT (underpowered and no blinding)
2 (305)
[27]
Ovulation rate
Urinary hCG plus clomifene citrate v
clomifene citrate alone
4
–2
0
0
0
Low
Quality points deducted for methodological weakness
in one RCT (underpowered and no blinding)
3 (211)
[24]
Pregnancy rate
Gonadotrophin-releasing hormone agonists plus gonadotrophins v gonadotrophins alone
4
–2
0
0
0
Low
Quality points deducted for methodological weaknesses in included RCTs (not stating method of randomisation and lack of blinding)
3 (187)
[24]
Ovulation rate
Gonadotrophin-releasing hormone agonists plus gonadotrophins v gonadotrophins alone
4
–3
0
0
0
Very low
Quality points deducted for sparse data and
methodological weaknesses in included RCTs (not
stating method of randomisation and lack of blinding)
2 (204)
[32]
Live birth rate
Gonadotrophin-releasing hormone antagonists v gonadotrophin-releasing
hormone agonists in an IVF cycle
4
–1
0
0
0
Moderate
Quality point deducted for incomplete reporting
4 (305)
[31]
Pregnancy rate
Gonadotrophin-releasing hormone antagonists v gonadotrophin-releasing
hormone agonists in an IVF cycle
4
–2
0
0
0
Low
Quality points deducted for inclusion of unpublished
data and methodological flaws in 2 RCTs (not stating
method of randomisation)
1 (28)
[37]
Pregnancy rate
Pulsatile gonadotrophin-releasing hormone v clomifene
4
–2
0
0
0
Low
Quality points deducted for sparse data and
methodological weaknesses
1 (28)
[37]
Ovulation rate
Pulsatile gonadotrophin-releasing hormone v clomifene
4
–2
0
0
0
Low
Quality points deducted for sparse data and
methodological weaknesses
Live birth rate
Laparoscopic ovarian drilling v gonadotrophins
4
0
0
–1
0
Moderate
Directness point deducted for inclusion of additional
treatments in one RCT.
Pregnancy rate
Laparoscopic ovarian drilling v gonadotrophins
4
0
0
–1
0
Moderate
Directness point deducted for inclusion of additional
treatments
Ovulation rate
Laparoscopic ovarian drilling v gonadotrophins
4
–1
0
0
0
Moderate
Quality point deducted for sparse data
2 (218)
[28]
at least 3 (at least
[28]
254)
1 (50)
[28]
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41
Women's health
Female infertility
Important outcomes
Live birth rates, pregnancy rates, ovulation rates, adverse effects
Number of studies
(participants)
1 (109)
[26]
2 (270)
[26]
1 (161)
[33]
[33]
Type
of evidence
Quality
Consistency
Directness
Effect
size
Outcome
Comparison
GRADE
Comment
Live birth rate
Laparoscopic ovarian drilling v metformin
4
–1
0
0
0
Moderate
Quality points deducted for sparse data
Pregnancy rate
Laparoscopic ovarian drilling v metformin
4
–1
0
–1
0
Low
Quality point deducted for incomplete reporting. Directness point deducted for inclusion of other treatments in one RCT
Ovulation rate
Laparoscopic ovarian drilling v metformin
4
–2
0
–1
0
Very low
Quality points deducted for incomplete reporting and
sparse data. Directness point deducted for inclusion
of other treatments in one RCT
1 (42)
[26]
Live birth rate
Laparoscopic ovarian drilling v laparoscopic ovarian drilling plus metformin
4
–2
0
0
0
Low
Quality points deducted for sparse data and
methodological weaknesses
1 (42)
[26]
Pregnancy rate
Laparoscopic ovarian drilling v laparoscopic ovarian drilling plus metformin
4
–2
0
0
0
Low
Quality points deducted for sparse data and
methodological weaknesses
3 (272)
[23]
Live birth rate
Metformin plus IVF v IVF alone
4
0
0
–1
0
Moderate
Directness point deducted for inclusion of ICSI in
some studies
5 (426)
[23]
Pregnancy rate
Metformin plus IVF v IVF alone
4
0
0
–2
0
Low
Directness points deducted for inclusion of ICSI in
some studies and different result in subgroup analysis
3 (105)
[43]
Pregnancy rates
Priming with gonadotrophins v no priming
4
–2
–1
0
0
Very low
Quality points deducted for sparse data and incomplete reporting of results. Consistency point deducted
for conflicting results
[47]
[45]
What are the effects of treatments for tubal infertility?
[51]
1 (31)
Pregnancy rate
Tubal flushing with oil-based media v
water-based
4
–2
0
0
0
Low
Quality points deducted for sparse data and subgroup
analysis
3 (295)
[55]
Live birth rate
Tubal surgery v no treatment/medical
treatment
4
0
0
–2
+1
Moderate
Directness points deducted for narrow inclusion criteria and use of different comparators. Effect size point
added for RR >2
3 (295)
[55]
Pregnancy rate
Tubal surgery v no treatment/medical
treatment
4
0
0
–2
0
Low
Directness points deducted for narrow inclusion criteria and use of different comparators
Pregnancy rate
CO2 laser adhesiolysis v diathermy adhesiolysis
4
–1
0
0
0
Moderate
Quality point deducted for sparse data
1 (63)
[53]
What are the effects of treatments for infertility associated with endometriosis?
11 (557)
1 (103)
1 (57)
[83]
[84]
[85]
Pregnancy rate
Ovulation suppression v placebo
4
0
0
–1
0
Moderate
Directness point deducted for wide range of interventions
Live birth rate
Intrauterine insemination plus gonadotrophins v no treatment
4
–1
0
–1
+2
High
Quality point deducted for sparse data. Directness
point deducted for narrow inclusion criteria. Effect
size points added for OR >5
Pregnancy rate
Intrauterine insemination plus gonadotrophins v intrauterine insemination
alone
4
–1
0
0
+2
High
Quality point deducted for sparse data. Effect size
points added for OR >5
© BMJ Publishing Group Ltd 2010. All rights reserved.
............................................................................................................
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42
Women's health
Female infertility
Important outcomes
Number of studies
(participants)
[86]
1 (51)
Live birth rates, pregnancy rates, ovulation rates, adverse effects
Type
of evidence
Quality
Consistency
Directness
Effect
size
Outcome
Comparison
GRADE
Comment
Pregnancy rate
Intrauterine insemination plus clomifene
v no treatment/expectant management
4
–1
0
–1
0
Low
Quality point deducted for sparse data. Directness
point deducted for no pre-crossover statistical assessment between groups
1 (62)
[51]
Live birth rate
Tubal flushing with oil soluble contrast
media v no treatment/expectant management
4
–2
0
0
0
Low
Quality points deducted for sparse data and subgroup
analysis
1 (62)
[51]
Pregnancy rate
Tubal flushing with oil soluble contrast
media v no treatment/expectant management
4
–2
0
0
0
Low
Quality points deducted for sparse data and subgroup
analysis
Pregnancy rate
Laparoscopic surgery v no surgery
4
0
0
–1
0
Moderate
Directness point deducted for composite outcome
2 (437)
[87]
What are the effects of treatments for unexplained fertility?
1 (387)
[98]
Live birth rate
Clomifene v placebo/expectant management
4
0
0
0
0
High
2 (460)
[97]
Pregnancy rate
Clomifene v placebo/expectant management
4
–1
0
0
0
Moderate
1 (384)
[98]
Live birth rate
Unstimulated IUI v expectant management
4
0
0
0
0
High
1 (384)
[98]
Pregnancy rate
Unstimulated IUI v expectant management
4
0
0
0
0
High
1 (113)
[99]
Quality point deducted for inclusion of one study
published in abstract form
Live birth rate
Unstimulated IUI v IVF
4
–1
0
0
0
Moderate
Quality point deducted for sparse data
1 (51)
[107]
Pregnancy rate
Stimulated IUI v expectant management
4
–2
0
–1
+1
Low
Quality points deducted for sparse data and poor
follow-up. Directness point deducted for inclusion of
women with endometriosis. Effect size point added
for effect size >2
1 (40)
[107]
Pregnancy rate
Stimulated IUI v clomifene
4
–2
0
0
0
Low
Quality points deducted for sparse data and subgroup
analysis
4 (396)
[107]
Live birth rate
Stimulated IUI v unstimulated IUI
4
0
0
0
+1
High
Effect size point added for effect size >2
4 (396)
[107]
Pregnancy rate
Stimulated IUI v unstimulated IUI
4
0
0
0
+1
High
Effect size point added for effect size >2
1 (118)
[99]
Live birth rate
Stimulated IUI v IVF
4
–1
0
0
0
Moderate
Quality point deducted for sparse data
1 (51)
[99]
Live birth rate
IVF v expectant management
4
–2
0
–1
+2
Moderate
Quality points deducted for sparse data and unequal
follow-up between groups. Directness point deducted
for uncertainty about significance of result. Effect size
points added for effect size >5
2 (86)
[99]
Pregnancy rate
IVF v expectant management
4
–2
0
0
+1
Moderate
Quality points deducted for sparse data and unequal
follow-up between groups. Effect size point added
for effect size >2
Type of evidence: 4 = RCT. Consistency: similarity of results across studies. Directness: generalisability of population or outcomes. Effect size: based on relative risk or odds ratio.
hCG, human chorionic gonadotrophin; hMG, human menopausal gonadotrophin; ICSI, intracytoplasmic sperm injection; IUI, intrauterine insemination; IVF, in vitro fertilisation.
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Women's health
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