Childbearing Beyond Age 40: Pregnancy
Outcome in 24,032 Cases
WILLIAM M. GILBERT, MD, THOMAS S. NESBITT, MD, AND BEATE DANIELSEN, PhD
Objective: To examine pregnancy outcomes in women age 40
or older.
Methods: We used data from the California Health Information for Policy Project, which consists of linked records
from the birth certificate and the hospital discharge record of
both mother and newborn of all births that occurred in acute
care civilian hospitals in California between January 1, 1992,
and December 31, 1993. The study population consisted of
all women who delivered at age 40 or over. The control
population was women who delivered between age 20 and
29 years during this 2-year period. We reviewed gestational
age at delivery, birth weight, mode and type of delivery,
discharge summary and birth certificate demographics, birth
outcome, pregnancy, and delivery data.
Results: Approximately 1,160,000 women delivered during
the study period, and 24,032 (2%) of these women were age
40 or older. Of this latter group, 4777 (20%) were nulliparous.
The cesarean delivery rate for nulliparous women in the
study population was 47.0%, and the rate for multiparous
patients in this group was 29.6%. The cesarean delivery rate
was 22.5% for nulliparous and 17.8% for multiparous women
in the control group. In the older group, the operative
vaginal delivery rate (forceps and vacuum) was 14.2% for
nulliparous women and 6.3% for multiparous women. Rates
of birth asphyxia, fetal growth restriction, malpresentation,
and gestational diabetes were significantly higher among
older nulliparas (6, 2.5, 11, and 7%, respectively) compared
with rates among control nulliparas (4, 1.4, 6, and 1.7%,
respectively), and there were similar significant increases
among older multiparas (3.4, 1.4, 6.9, and 7.8%, respectively),
compared with younger multiparous controls (2.4, 1, 3.7, and
1.6%, respectively). Mean (6
6 standard error) birth weight of
infants delivered by older nulliparous women was 3201 6
10 g, significantly lower than that among nulliparous controls (3317 6 1 g), whereas mean birth weight in the group of
older multiparas (3381 6 5 g) was no different than that
among younger multiparous controls (3387 6 1 g). Gestational age at delivery was significantly lower among older
nulliparas (273.4 6 0.4 days), compared with nulliparous
controls (278.5 6 0.05 days), and similarly lower among older
multiparous women (274.0 6 0.2 days), compared with
From the Department of Obstetrics and Gynecology, Center for Health
Services Research in Primary Care, University of California, Davis; and
Health Information Solutions, Redwood City, California.
VOL. 93, NO. 1, JANUARY 1999
multiparous controls (278.3 6 0.05 days). More white women
age 40 or over than younger white women were having a first
child (64 and 39%, respectively).
Conclusion: Nulliparous women age 40 or over have a
higher risk of operative delivery (cesarean, forceps, and
vacuum deliveries: 61%) than do younger nulliparous
women (35%). This increase occurs in spite of lower birth
weight and gestational age and may be explained largely by
the increase in other complications of pregnancy. The increased frequency at which white women are having their
first child at age 40 or over may reflect career choices that
involve delaying childbirth until the fifth decade of life.
These data will allow us better to counsel patients about
their pregnancy expectations and possible outcomes. (Obstet
Gynecol 1999;93:9 –14. © 1999 by The American College of
Obstetricians and Gynecologists.)
Many women today are delaying childbearing until the
fourth or fifth decade of life. The reasons for these
delays are multiple and include pursuance of professional careers and delaying of marriage. Historically,
women who desired to become pregnant after age 35
often were discouraged from considering pregnancy
because of the increase in both maternal and perinatal
morbidity and mortality.1–5 Those who presented pregnant were characterized as being of advanced maternal
age and were encouraged to undergo prenatal genetic
testing because of the significant increase in chromosomal aneupoldy associated with motherhood at an
older age.6 Recent literature, however, suggests that
when underlying maternal disease conditions (eg, diabetes, hypertension) are taken into account, women in
this age group are at minimal increased risk for maternal morbidity, and, in fact, overall neonatal outcomes
do not appear to be affected significantly.7–10
Initial pregnancies occurring in women age 40 or over
are relatively rare but are increasing in frequency.11–13
First-time mothers in this age group are presenting for
counseling before conception or early in the first pregnancy with a desire to know risks associated with their
pregnancies. Often they are well-educated professionals
0029-7844/99/$20.00
PII S0029-7844(98)00382-2
9
who purposely have delayed childbearing and who
want as little intervention as possible. They often request medical literature concerning their risks so that
they can make informed decisions. The medical literature on this topic, however is composed largely of
reports of studies involving small populations of patients, with the majority of patients being multiparous;
or reports of data collected over many years and in the
setting of changing practice patterns.12 Multiparous
patients have many unique problems that often are
unrelated to problems of first-time mothers, and results
from these studies may not be of help to physicians
counseling first-time patients about pregnancy outcomes. In this study, we present data from the 2-year
period of January 1, 1992, through December 31, 1993,
for all patients age 40 or over who delivered in acute
care civilian hospitals in California and we compare
these data with those for a control group of all patients
20 –29 years of age who delivered during the same
period.
Materials and Methods
A newly created unique database was used that linked
maternal and neonatal/infant hospital discharge
records to birth and death certificate records. The linkage of vital statistics data was established for all civilian
hospitals that report to the California Office of Statewide Health Planning and Development during 1992–
1993. This database did not include deliveries in military facilities, home deliveries, out-of-state deliveries,
and deliveries at birthing centers not reporting to the
California Office of Statewide Health Planning and
Development. The linkage method successfully linked
98.9% of maternal and 98.6% of neonatal/infant hospital discharge records with birth and death records, an
overall linkage of 97.9%. This generated a database of
more than 1.16 million deliveries. Using SAS software
(SAS Institute, Cary, NC) we searched the database,
utilizing codes from International Classification of Diseases, Ninth Revision14 (ICD-9). This resulted in a specific
data set for statistical analysis.
The linked database was searched with respect to
multiple demographics and antepartum, intrapartum,
and postpartum diagnoses. The database initially was
sampled for all women age 40 or older on the day of
delivery (study population). These records then were
examined for ICD-9 and Current Procedural Terminology codes relating to pregnancy outcomes.15 A control
group of patients was obtained by retrieving records of
all delivering patients who were 20 –29 years of age on
the day of delivery. Data for this second group were
likewise examined for particular ICD-9 and Current
Procedural Terminology codes. Each of these groups
10 Gilbert et al
Pregnancy After Age 40
Figure 1. Number of women (age 40 –50) delivering between January
1, 1992, and December 31, 1993.
then was divided into a nulliparous subgroup and a
multiparous subgroup.
We compared race, mode of delivery, mean birth
weight, and gestational age between the study and
control groups stratified by parity. We ascertained the
incidence of several birth outcomes as well as maternal
complications. Because racial and payer type differences existed, we calculated adjusted odds ratios (ORs)
comparing deliveries of women age 40 or older with
deliveries of women age 20 –29 stratified by parity. Race
was divided into white, Hispanic, black, Asian, and
other. Payer types were MediCal, private insurance,
health maintenance organization, self, and other. We
used the following birth outcomes and pregnancy complications: birth trauma, birth asphyxia, fetal growth
restriction (FGR), intraventricular hemorrhage, infant
death, neonatal death, malpresentation, fetal disproportion, obstructed labor, abnormal forces of labor, prolonged labor, preeclampsia, chronic hypertension, maternal diabetes, gestational diabetes, prematurity (less
than 37 weeks’ gestation), and postterm delivery (over
42 weeks’ gestation). These outcomes and complications of pregnancy were defined according to ICD-9
and birth certification data.
Results
The entire population of patients whose discharge information was available and who delivered during the
period of the study included approximately 1,160,000
women. There were 24,032 patients in the study population age 40 or older (nulliparas, 4777; multiparas,
19,255), representing 2.1% of the total population. The
control population (age 20 –29) was composed of
642,525 patients (nulliparas, 258,900; multiparas,
383,625), or 55% of the entire population. In Figure 1,
the age distribution of the study population of all
patients age 40 or older is demonstrated. The majority
of patients age 40 or older at the time of delivery are in
their early 40s.
In Table 1, the racial distribution is given for both the
nulliparous and multiparous subgroups in each age
Obstetrics & Gynecology
Table 1. Demographics and Gestational Characteristics
Nulliparas
$40 y
Maternal race (%)
White
Hispanic
Asian
Black
Delivery mode (%)
Cesarean
Forceps
Vacuum
Mean gestational age (d)
Mean birth weight (g)
Multiparas
20 –29 y
64
14
17
4
39
43
11
6*
47.0
4.5
9.7
273.4 6 0.4
3201 6 10
22.5
3.1
9.8*
278.5 6 0.05
3317 6 1
$40 y
20 –29 y
41
36
18
5
31
52
7
9
29.6
1.2
5.1
274.0 6 0.2
3381 6 5
17.8
0.8
3.8
278.3 6 0.05
3387* 6 1
Data are presented as % or mean 6 standard error.
* P 5 not significant. P , .05 for remaining statistical comparisons between age groups within the nulliparous and multiparous subgroups.
group. The most significant finding was the high percentage (64%) of white women age 40 or older (64%)
undergoing a first delivery. In the other groups the
racial distribution was more uniform. Cesarean and
operative vaginal delivery (forceps and vacuum) rates
were significantly higher in the older nulliparous group
compared with the control group and the older multiparous group.
Table 2 displays the various pregnancy outcomes as
determined from discharge records and birth certificates for both groups and subgroups. There were statistically significant increases in the rates of most complications of pregnancy among the nulliparous women
age 40 or older compared with the other groups. These
increases were seen in both underlying maternal medical complications and complications of labor.
In Table 3, the newborn complications are presented
for both divisions of each group, with adjusted ORs,
adjusting for race and payer source. The rate of birth
trauma was decreased in the older nulliparous group of
patients compared with the control patients, most likely
because of the increased cesarean delivery rate in the
older group. In addition, infant and neonatal death
rates were not increased among the older nulliparous
patients but were increased among the multiparous
patients compared with the control group.
Discussion
This study shows that first-time mothers who are giving
birth at age 40 or older are at high risk for some form of
operative delivery (our findings: cesarean delivery,
47.0%; operative vaginal delivery, 14.2%), compared
with younger nulliparous women (cesarean delivery,
Table 2. Antepartum- and Intrapartum-Associated Diagnoses
Nulliparous (%)
Diagnosis
ICD-9 code
$40 y
20 –29 y
Adjusted OR*
(95% CI)
Malpresentation
Fetal disproportion
Obstructed labor
Abnormal forces labor
Prolonged labor
Preeclampsia†
Chronic HTN‡
Maternal diabetes
Gestational diabetes
Placenta previa
Prematurity§
Postterm delivery\
652
653
660
661
662
642.4
642.2
648.0
648.8
762.0
11
10.6
12.6
16.0
3.6
5.4
1.6
1.4
7.0
0.25
14.1
7.2
6
6.8
10.8
10.8
2.5
3.4
0.3
0.5
1.7
0.03
9.1
12.1
1.7 (1.6, 1.9)
1.5 (1.4, 1.7)
1.3 (1.2, 1.4)
1.5 (1.4, 1.7)
1.3 (1.1, 1.6)
1.8 (1.6, 2.1)
4.7 (3.7, 6.0)
3.3 (2.5, 4.2)
4.0 (3.6, 4.5)
10.5 (5.4, 20)
1.7 (1.6, 1.9)
0.6 (0.5, 0.7)
Multiparous (%)
$40 y
20 –29 y
Adjusted OR*
(95% CI)
6.9
2.9
7.8
7.8
0.9
2.7
1.8
2.7
7.8
0.13
13.7
7.4
3.7
1.8
6.3
6.3
0.6
1.0
0.2
0.5
1.6
0.05
10.3
12.0
1.4 (1.3, 1.5)
1.6 (1.4, 1.7)
1.4 (1.3, 1.5)
1.2 (1.1, 1.3)
1.5 (1.3, 1.8)
3.1 (2.8, 3.4)
8.9 (7.8, 10.2)
6.4 (5.8, 7.1)
4.0 (3.6, 4.5)
2.7 (1.8, 3.6)
1.4 (1.3, 1.5)
0.65 (0.6, 0.7)
ICD-9 5 International Classification of Diseases, 9th Revision; OR 5 odds ratio; CI 5 confidence interval; HTN 5 hypertension.
* Adjusted for race and payer type.
†
ICD-9 codes 642.4, 642.5, and 642.7.
‡
ICD-9 codes 642.0, 642.1, and 642.2.
§
Less than 37 weeks’ gestation.
\
More than 42 weeks’ gestation.
VOL. 93, NO. 1, JANUARY 1999
Gilbert et al
Pregnancy After Age 40
11
Table 3. Neonatal and Infant Complications
Nulliparas (%)
Multiparas (%)
Diagnosis
ICD-9 code
$40 y
20 –29 y
Adjusted OR*
(95% CI)
$40
20 –29 y
Adjusted OR*
(95% CI)
Birth trauma
Any birth asphyxia
FGR
IVH
Infant death
Neonatal death
767
768
764
772.1
6.6
6.0
2.5
0.2
0.54
0.4
8.2
4.0
1.4
0.1
0.53
0.35
0.8 (0.7, 0.9)
1.6 (1.4, 1.8)
1.9 (1.6, 2.3)
1.9 (0.9, 3.9)†
1.2 (0.8, 1.8)†
1.4 (0.9, 2.2)†
4.3
3.4
1.4
0.14
0.96
0.6
4.2
2.4
1.0
0.08
0.71
0.39
1.1 (1.0, 1.15)†
1.5 (1.4, 1.7)
1.6 (1.4, 1.8)
1.9 (1.3, 2.8)
1.5 (1.3, 1.8)
1.7 (1.3, 1.9)
FGR 5 fetal growth restriction; IVH 5 intraventricular hemorrhage; all other abbreviations as in Table 2.
* Adjusted for race and payer type.
†
Not statistically significant.
22.5%; operative vaginal delivery, 12.9%). The multiparous women in our study who were age 40 or older
had significant increases in rates of operative deliveries
(cesarean delivery, 29.6%; operative vaginal delivery,
6.3%) compared with younger controls (17.8 and 4.6%,
respectively). The significantly increased operative delivery risk may be explained largely by the antepartum
or intrapartum complications such as malpresentation
and abnormal forces of labor, but other nonmeasured
factors must be taken into account. Older nulliparous
women frequently have a long history of infertility and
become pregnant with the aid of assisted reproductive
technology. Couples’ demands for perfect pregnancy
outcomes may cause providers to deliver the infants
early because of anxiety concerning stillbirth. The mean
gestational age at delivery for the older study population was lower than for the control population and may
reflect this desire for optimal outcome. The degree to
which physician anxiety and patient anxiety add to the
increased operative delivery rate is unknown. As the
number of women having their first child at age 40 or
over continues to grow, it is to be hoped that anxiety
will decrease and the cesarean delivery rate will decrease as well. The data obtained in our study may
assist health care providers in counseling patients concerning their expectations of pregnancy outcomes.
The cesarean delivery rate of 47% for the study’s
nulliparous women age 40 or older is twice the rate for
the control group and 50% more than the rate for the
multiparous women age 40 or over. In the literature
there are only limited data concerning cesarean delivery
rates for nulliparous women age 40 or older.7,12,13,16
Bianco et al7 reported a 39% cesarean delivery rate for
nulliparous women age 40 or older in a population of
607 patients, and these authors concluded that although
there was an increase in antepartum and intrapartum
complications, the neonatal outcome overall did not
appear to be affected by maternal age. More data exist
concerning cesarean delivery rates among nulliparous
women age 35 or older.9,10,17 Edge and Laros9 reported
12 Gilbert et al
Pregnancy After Age 40
a 40% cesarean delivery rate for nulliparous patients
age 35 or over, a rate that could be explained only
partially by presence of gestational complications. The
data were collected over 15 years, and changes in
physician practice patterns could not be taken into
account easily, especially given that the cesarean delivery rate has increased from approximately 5% to 24%
during that period.9 Prysak et al10 reported a slightly
higher cesarean delivery rate of 44% in 890 nulliparous
women age 35 or older and likewise reported an
increase in antepartum, intrapartum, and newborn
complications, but overall the perinatal outcomes were
good. Our study finding of one of the highest cesarean
delivery rates reported may be more accurate for current conditions. Furthermore, because our population
comprises the vast majority of patients who delivered in
California over a 2-year period, a true population
cesarean delivery rate can be determined. Most earlier
studies report individual hospital cesarean delivery
rates.
Virtually every complication of pregnancy was increased in older nulliparous patients compared with
both older multiparous and control patients (Table 2).
The most striking differences were in the areas of
malpresentation and dystocia. The diagnosis of dystocia is physician derived, and often there is inadequate
documentation of an appropriate trial of labor. The
effects of patient and physician anxiety on what is
considered an appropriate trial of labor cannot be
measured in our, or any, database. Malpresentation, on
the other hand, is determined more easily and thus may
represent a true and measurable cause for an increase in
the cesarean delivery rate in older nulliparous patients.
The rate of preeclampsia was increased in older nulliparous patients by 60% compared with control nulliparous patients and double the rate for older multiparous patients (Table 2). Another pregnancy-related
disease, gestational diabetes, was increased dramatically (four-fold) in both older nulliparous and multiparous patients compared with controls, which suggests
Obstetrics & Gynecology
that maternal age, not parity, is involved in the increase
in this disease.
Certain underlying maternal diseases were increased
in the older women, compared with the controls.
Chronic hypertension was increased five-fold in older
nulliparous patients and nine-fold in older multiparous
patients, compared with control nulliparous and multiparous women, respectively. The effect that hypertension may have had on pregnancy outcome is unknown
but hypertension may have led to the increase in
preeclampsia. Placenta previa was increased more than
eight-fold in the older nulliparous group, compared
with control nulliparous patients. Multiparity has long
been known to increase risk for placenta previa, and our
data support this (Table 2). The large increase in the rate
of placenta previa that was observed in our study’s
nulliparous patients age 40 or over is unprecedented
and currently without explanation. The rate of pregestational diabetes was increased in the older nulliparous
group as well as in the older multiparous group,
compared with controls. Similar increases in pregnancy
complications in the older nulliparous patient have
been noted previously. Cnattingius et al8 examined
records from a large population of Swedish mothers
and found that multiple indicators of poor pregnancy
outcome were increased as the age of the mother
increased from 20 –24 to 30 –34 years and compared
with mothers over age 40. Their outcomes included
small for gestational age, low birth weight, preterm
delivery, and fetal death. These investigators8 found
that uncomplicated first pregnancies in women over
age 40 still were associated with poor pregnancy outcomes, even when underlying medical conditions were
taken into account.
Neonatal complications were largely increased in the
older patients in our study, with a 50% increase in birth
asphyxia, a 40 – 80% increase in FGR, and a 70 –100%
increase in intraventricular hemorrhage, compared
with control patients (Table 3). These results are consistent with those reported in the older literature, which
cited increases in perinatal morbidity and mortality.1–5
In spite of these increases in complications, the vast
majority of neonatal outcomes were good, with no
increase in either neonatal or infant death among the
older nulliparous patients and a slight increase in these
rates among the older multiparous patients, compared
with controls.
The racial distribution of our study population was
different than that of the control population. The total
number of white women having children in California
during these 2 years was roughly equal to the total
number of Hispanic women having children (Table 1).
In the study population, however, the percentage of
nulliparous white women was increased dramatically
VOL. 93, NO. 1, JANUARY 1999
(62%), which suggests that this group is more likely to
delay childbearing than are all other racial groups. The
racial distribution of the older multiparous patients was
much closer to that of the control population, which
suggests that there was a more usual racial distribution
compared with the older nulliparous population. All
analyses of pregnancy outcomes were risk adjusted for
race and payer type to remove the effect that these two
factors have on outcome.
Mean gestational age for the study population at
delivery (39.1 weeks) was statistically significantly
lower than that for the control population (39.8 weeks),
by 4 –5 days. Gestational age was lower even when
parity was taken into account (Table 1). The causes are
unknown but may relate to underlying maternal or fetal
problems such as diabetes, chronic hypertension, and
fetal distress. It is not known whether this earlier
gestational age of delivery is clinically significant. The
differences in birth weight between groups are similar
(Table 1), with multiparous patients having larger infants, compared with nulliparous patients, a finding
that is consistent with findings reported in the literature. The mean birth weights of infants born to the
multiparous patients were almost exactly the same for
the two age groups, and this would suggest that maternal age may not affect birth weight as much as other
factors. The nulliparous patients age 40 or older were
associated with the lowest birth weights and the highest
cesarean delivery rates.
One of the limitations of this study is that the data
were taken from maternal and infant/neonatal hospital
discharge summaries that were matched to birth and
death certificates. One criticism of this database is that
quality of diagnosis reporting can vary. The majority of
chart abstracting is performed by medical record personnel within each hospital. Although most of the data,
including maternal demographics and primary birth
outcomes such as gestational age and birth weight, are
reliable, other more obscure outcomes may be missed
by abstractors. Major outcomes such as cesarean or
operative vaginal delivery are likely to be recorded
correctly because of increases in hospital reimbursement with more complicated ICD-9 coding and procedural coding. In addition, the California birth certificate
has been shown to be a reliable source of insurance
information and other interview questions, compared
with direct patient interviews.18 Also, the linked database allows for confirmation of certain major outcomes
in both the hospital discharge record and the birth
certificate record, and records were found to be
matched correctly in more than 97% of cases. Furthermore, the fact that many of the outcome rates in our
study were similar to those found in studies involving
Gilbert et al
Pregnancy After Age 40
13
smaller populations suggests that there was a reasonable degree of reliability.
Additional work is needed in the area of complications of pregnancy in older women and birth outcomes
of their offspring so that better management protocols
may be developed. As the body of reported data grows,
older women will have more information with which to
make decisions regarding childbearing.
References
1. Kane SH. Advanced age and the primigravida. Obstet Gynecol
1967;29:409 –14.
2. Hansen JP. Older maternal age and pregnancy outcome: A review
of the literature. Obstet Gynecol Surv 1986;41:726 – 42.
3. Kim DS, Dorchester W, Freeman RC. Advanced maternal age: The
mature gravida. Am J Obstet Gynecol 1985;152:7–12.
4. Kessler I, Lancet M, Borenstein R, Steinmetz A. The problem of the
older primipara. Obstet Gynecol 1980;56:165–9.
5. Naeye R. Maternal age, obstetric complications, and the outcome
of pregnancy. Obstet Gynecol 1983;61:210 – 6.
6. Hook EB. Rates of chromosomal abnormalities at different maternal ages. Obstet Gynecol 1981;58:282–5.
7. Bianco A, Stone J, Lynch L, Lapinski R, Berkowitz G, Berkowitz
RL. Pregnancy outcome at age 40 and older. Obstet Gynecol
1996;87:917–22.
8. Cnattingius S, Forman MR, Berendes HW, Isotalo L. Delayed
childbearing and risk of adverse perinatal outcome: A populationbased study. JAMA 1992;268:886 –90.
9. Edge V, Laros RK. Pregnancy outcome in nulliparous women aged
35 or older. Am J Obstet Gynecol 1993;168:1881–5.
10. Prysak M, Lorenz RP, Kisly A. Pregnancy outcome in nulliparous
women 35 years and older. Obstet Gynecol 1995;85:65–70.
11. Ventura SJ. Trends and variations in first births to older women,
United States, 1970 – 86. Vital Health Stat 1989;21:1–27.
14 Gilbert et al
Pregnancy After Age 40
12. Spellacy WN, Miller SJ, Winegar A. Pregnancy after 40 years of
age. Obstet Gynecol 1986;68:450 – 4.
13. Lehmann DK, Chism J. Pregnancy outcome in medically complicated and uncomplicated patients aged 40 years or older. Am J
Obstet Gynecol 1987;157:738 – 42.
14. World Health Organization. International Classification of Diseases. 9th rev. Geneva: World Health Organization, 1997.
15. Physician’s Current Procedural Terminology CPT 1998. 2nd ed.
Chicago: American Medical Association, 1998.
16. Ekblad U, Vilpa T. Pregnancy in women over forty. Ann Chir
Gynaecol Suppl 1994;208:68 –71.
17. Gordon D, Milberg J, Daling J, Hickok D. Advanced maternal age
as a risk factor for cesarean delivery. Obstet Gynecol 1991;77:493–7.
18. Braveman P, Pearl M, Egerter S, Marchi K, Williams R. Validity of
insurance information on California birth certificates. Am J Public
Health 1998;88:813– 6.
Address reprint requests to:
William M. Gilbert, MD
University of California, Davis
4860 Y Street
Suite 2500
Sacramento, CA 95817
E-mail: wmgilbert@ucdavis.edu
Received February 25, 1998.
Received in revised form June 29, 1998.
Accepted July 17, 1998.
Copyright © 1999 by The American College of Obstetricians and
Gynecologists. Published by Elsevier Science Inc.
Obstetrics & Gynecology