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Search Strategy |
---|
#1 (“mediterranean diet” [Title/Abstract] OR “diet, mediterranean” [MeSH Terms]) |
#2 (“reproductive techniques assisted” [Title/Abstract] OR “reproductive techniques, assisted [MeSH Terms] OR “IVF” [Title/Abstract] OR “fertilization in vitro” [Title/Abstract] OR “fertilization in vitro” [MeSH Terms] OR “insemination artificial” [Title/Abstract] OR “insemination, artificial” [MeSH Terms]) |
#3 “Outcomes” [Title/Abstract] |
#4 1 AND 2 AND 3 |
Authors, Year | Country |
Age Range |
Sample Size (n) |
Objective |
Strengths and Limitations |
Study Type |
Vujkovic M et al., 2010 [25] | Netherlands | 23-45 years |
161 women |
Investigate associations between preconception dietary patterns and outcomes of IVF/ICSI. | Limitations: Self-reported FFQ, limited external validity. Strengths: Prospective design, analysis of correlation between dietary patterns and biomarkers. |
Cohort |
Karayiannis D et al., 2018 [26] | Greece | 22-41 years |
244 women |
Explore potential associations between MD and clinical outcomes of IVF among non-obese women from infertile couples. | Limitations: Self-administered dietary questionnaire, possible presence of confounding variables, limited causal inference. Strengths: Non-obese patients, comprehensive follow-up of the sample, assessment of intermediate and final outcomes. |
Cohort |
Gaskins AJ et al., 2019 [27] | USA | 18-46 years |
357 women |
Evaluate the relationship between pre-treatment adherence to various dietary patterns (including MD) and outcomes of ART. | Limitations: Self-administered FFQ, possible presence of confounding variables, limited external validity. Strengths: Prospective design, comprehensive sample assessment, comparison of various dietary patterns. |
Cohort |
Ricci E et al., 2019 [28] | Italy | 27-45 years | 474 women |
Study the relationship between MD and outcomes of ART in subfertile couples. | Limitations: Self-administered FFQ, non-validated measurements of some variables, low study power. Strengths: Prospective design, relatively large sample size. |
Cohort |
Sun HM et al., 2019 [29] | China | 18-40 years | 590 women |
Explore the correlation between the pattern of MD in infertile women and their clinical outcomes in IVF cycles. | Limitations: Low external validity, non-validated FFQ. Strengths: Large sample size, non-obese patients. |
Cohort |
Kermack AJ et al., 2020 [32] | United Kingdom | 18-41 years | 111 women |
Study the impact of increased dietary intake of omega-3 fatty acids, vitamin D, and olive oil for 6 weeks prior to IVF or ICSI on morphokinetic markers of early embryonic development. | Limitations: Short dietary intervention (6 weeks); limited external validity. Strengths: Study design, double-blind randomization, comprehensive sample follow-up. |
Clinical trial |
Salas-Huetos A et al., 2022 [30] | USA | 18-45 years | 245 men |
Investigate whether men’s adherence to dietary patterns promoted for the prevention of cardiovascular diseases is associated with semen parameters and outcomes of ART in their partners. | Limitations: Observational design, potential residual confounding factors. Strengths: Prospective design, comprehensive sample follow-up, consideration of intermediate and final outcomes, statistical adjustment for relevant confounding factors. |
Cohort |
Salas-Huetos A et al., 2023 [31] | USA | 18-45 years |
612 women | Investigate whether women’s adherence to dietary patterns (including MD) is associated with infertility treatment outcomes. | Limitations: Single-center study, potential residual confounding factors, limited external validity. Strengths: Prospective design, analysis of multiple dietary patterns, high standardization level of covariables, exposures, and study outcomes. |
Cohort |
Noli SA et al., 2023 [24] | Italy | 18-39 years | 296 women | Evaluate whether preconceptional adherence to MD can influence the risk of poor ovarian response in patients without criteria/risk factors for it. | Limitations: Cross-sectional design, self-administered dietary questionnaire, limited external validity. Strengths: Relatively large sample size, comprehensive statistical analysis. |
Cross-sectional |
Reference | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Noli SA et al., 2023 [24] | yes | yes | yes | yes | yes | yes | dk | yes | yes | yes | yes | yes | no | yes | dk | yes | yes | yes | no | yes |
Reference | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
---|---|---|---|---|---|---|---|---|
Vujkovic M et al., 2010 [25] | * | * | * | * | * | * | * | - |
Karayiannis D et al., 2018 [26] | * | * | * | * | ** | * | * | * |
Gaskins AJ et al., 2019 [27] | * | * | * | * | ** | * | * | * |
Ricci E et al., 2019 [28] | * | - | * | * | * | * | * | - |
Sun HM et al., 2019 [29] | * | * | * | * | ** | * | * | * |
Salas-Huetos A et al., 2022 [30] | * | * | * | * | ** | * | * | - |
Salas-Huetos A et al., 2023 [31] | * | * | * | * | ** | * | * | - |
Authors, Year | Determination of Adherence to the MD / Intervention |
Variables Analyzed to Determine ART Outcomes |
Results | Conclusions | Quality of Evidence (GRADE) |
---|---|---|---|---|---|
Vujkovic M et al., 2010 [25] | A 195-item FFQ with 22 food groups was used and adjusted for total energy intake. This was followed by a principal component analysis applied to the food groups to construct dietary patterns. Two patterns emerged: “health-conscious, minimally processed” and “MD” | 1) Fertilization rate 2) Embryo quality 3) Biochemical pregnancy |
The dietary pattern of the MD correlated positively with red blood cell folate (β=0.13) and vitamin B6 in blood (β=0.09) and follicular fluid (β=0.18). High adherence by the couple to the MD increased the likelihood of pregnancy (OR: 1.4). | A MD before conception by couples undergoing IVF/ICSI treatment contributes to the success of achieving pregnancy. | Low ⊕⊕⊝⊝ |
Karayiannis D et al., 2018 [26] | A questionnaire was used to assess adherence to the MD (PMD) previously developed by Panagiotakos et al., in 2007. | 1) Ovarian stimulation results 2) Fertilization rate 3) Embryo quality 4) Clinical pregnancy 5) Live birth |
Women in the lowest third of adherence to the MD had at least a 65% lower relative risk (95% CI) of achieving clinical pregnancy (p=0.01) and live births (p=0.01). No significant association of MedDietScore with intermediate study outcomes (ovarian stimulation results, fertilization rate, and measures of embryo quality) was observed. | Higher adherence to the MD is associated with a greater likelihood of clinical pregnancy and live births after IVF/ICSI treatment in non-obese women <35 years of age. | Low ⊕⊕⊝⊝ |
Gaskins AJ et al., 2019 [27] | Validated 131-item FFQ Subsequently, the Mediterranean Diet Score (MDS) was calculated to assess adherence to the MD. | 1) Fertilization rate 2) Number of mature oocytes 3) Implantation rate 4) Clinical pregnancy 5) Live birth |
Women in the second to fourth quartiles of adherence to the MD had a significantly higher likelihood of live birth compared to women in the first quartile. However, there was no additional benefit of adherence to the MD beyond the second quartile. Higher adherence to the “fertility-promoting” diet was linearly associated with ART outcomes. | No association was found between adherence to the MD and ART outcomes. However, higher adherence to the “fertility-promoting” (rich in folic acid, vitamin B12, vitamin D, pesticide-residue-low agricultural products, whole grains, dairy, soy foods, and seafood) diet was associated with a higher likelihood of live birth after ART. | Low ⊕⊕⊝⊝ |
Ricci E et al., 2019 [28] | Information was collected using a valid and reproducible FFQ. The FFQ included the average weekly consumption of 78 individual foods or food groups. Adherence to the MD was assessed using the MDS developed by Trichopoulou et al., (2003). | 1) Number of retrieved high-quality oocytes 2) Embryo quality 3) Clinical pregnancy 4) Live birth |
No significant association was found with the components of the MDS. | No clear association was observed between adherence to the MD and successful IVF. | Very low ⊕⊝⊝⊝ |
Sun HM et al., 2019 [29] | A 69-item FFQ was used, and then adherence to the Mediterranean Diet was evaluated using the Mediterranean Diet Score (MDS) developed by Trichopoulou et al., (2003). | 1) Available embryos 2) Implantation rate 3) Number of fertilized oocytes 4) Clinical pregnancy |
The group with higher adherence to the MD showed a greater number of available embryos (p=0.028). Clinical pregnancy rate and implantation rate were similar between the two groups. In additional correlation tests and multivariate linear regression analysis, the number of fertilized oocytes and embryo production correlated positively with participants’ adherence to the MD. | Infertile women with higher adherence to the MD pattern were likely to obtain more available embryos in the IVF cycle. | Low ⊕⊕⊝⊝ |
Kermack AJ et al., 2020 [32] | The study group received olive oil for cooking, a spread made from olive oil, and a daily complementary beverage enriched with EPA (800 mg), DHA (1200 mg), and vitamin D (10 μg). | Embryo quality (validated morphokinetic parameters of embryonic development associated with a higher probability of blastocyst development, implantation, and clinical pregnancy). | The 4th cell cycle was accelerated in the study group, and a significantly shorter synchrony of the 3rd cell cycle was observed, along with an increase in KIDScore (known implantation data scores) on day 3, indicating better embryo quality in the study group. | This study suggests that a short period of dietary supplementation alters the embryo’s division rate (improved embryo quality). Further research is needed to assess whether the impact on embryonic development translates into better clinical outcomes. | High ⊕⊕⊕⊕ |
Salas-Huetos A et al., 2022 [30] | Male pre-treatment dietary intake was assessed using a validated 131-item FFQ, from which three scores were calculated: (1) MDS, (2) AMD, (3) PMD. | 1) Fertilization rate 2) Implantation rate 3) Clinical pregnancy 4) Live birth |
There was a reverse association between men’s adherence to the PMD and the fertilization rate. However, there were no significant associations between men’s adherence to any of the analyzed dietary patterns and the odds of implantation, clinical pregnancy, or live birth in adjusted multivariable models. | Men’s adherence to various a priori defined dietary scores with documented cardiovascular benefits is not related to significant outcomes of ART. | Low ⊕⊕⊝⊝ |
Salas-Huetos A et al., 2023 [31] | Women’s pre-treatment diet was assessed using a validated FFQ from which three indices were calculated: (1) MDS, (2) AMD, (3) PMD. | 1) Clinical pregnancy 2) Total pregnancy loss 3) Clinical pregnancy loss 4) Live birth |
There was no association between women’s adherence to dietary patterns and the likelihood of clinical pregnancy or live birth after IVF or AI. | The findings of this study suggest that there is no association between adherence to the MD and ART outcomes. | Low ⊕⊕⊝⊝ |
Noli SA et al., 2023 [24] | A MD index (MDS) developed by Trichopoulou et al., (2003) was used and later modified for Italian dietary habits. | Poor ovarian response (retrieval of three or fewer suitable oocytes) in patients without criteria/risk factors for it | The risk of poor ovarian response was significantly lower for women in the second tertile of MDS compared to the first tertile (OR: 0.29) and for women in the second and third tertiles, grouped together, compared to the first tertile (OR: 0.34). | Low adherence to the MD could be a risk factor for poor ovarian response in patients without criteria/risk factors for it. | Low ⊕⊕⊝⊝ |
Disclaimer/Publisher’s Note: The statements, opinions and data contained in all publications are solely those of the individual author(s) and contributor(s) and not of MDPI and/or the editor(s). MDPI and/or the editor(s) disclaim responsibility for any injury to people or property resulting from any ideas, methods, instructions or products referred to in the content. |
Submitted:
04 December 2023
Posted:
05 December 2023
You are already at the latest version
Submitted:
04 December 2023
Posted:
05 December 2023
You are already at the latest version
Search Strategy |
---|
#1 (“mediterranean diet” [Title/Abstract] OR “diet, mediterranean” [MeSH Terms]) |
#2 (“reproductive techniques assisted” [Title/Abstract] OR “reproductive techniques, assisted [MeSH Terms] OR “IVF” [Title/Abstract] OR “fertilization in vitro” [Title/Abstract] OR “fertilization in vitro” [MeSH Terms] OR “insemination artificial” [Title/Abstract] OR “insemination, artificial” [MeSH Terms]) |
#3 “Outcomes” [Title/Abstract] |
#4 1 AND 2 AND 3 |
Authors, Year | Country |
Age Range |
Sample Size (n) |
Objective |
Strengths and Limitations |
Study Type |
Vujkovic M et al., 2010 [25] | Netherlands | 23-45 years |
161 women |
Investigate associations between preconception dietary patterns and outcomes of IVF/ICSI. | Limitations: Self-reported FFQ, limited external validity. Strengths: Prospective design, analysis of correlation between dietary patterns and biomarkers. |
Cohort |
Karayiannis D et al., 2018 [26] | Greece | 22-41 years |
244 women |
Explore potential associations between MD and clinical outcomes of IVF among non-obese women from infertile couples. | Limitations: Self-administered dietary questionnaire, possible presence of confounding variables, limited causal inference. Strengths: Non-obese patients, comprehensive follow-up of the sample, assessment of intermediate and final outcomes. |
Cohort |
Gaskins AJ et al., 2019 [27] | USA | 18-46 years |
357 women |
Evaluate the relationship between pre-treatment adherence to various dietary patterns (including MD) and outcomes of ART. | Limitations: Self-administered FFQ, possible presence of confounding variables, limited external validity. Strengths: Prospective design, comprehensive sample assessment, comparison of various dietary patterns. |
Cohort |
Ricci E et al., 2019 [28] | Italy | 27-45 years | 474 women |
Study the relationship between MD and outcomes of ART in subfertile couples. | Limitations: Self-administered FFQ, non-validated measurements of some variables, low study power. Strengths: Prospective design, relatively large sample size. |
Cohort |
Sun HM et al., 2019 [29] | China | 18-40 years | 590 women |
Explore the correlation between the pattern of MD in infertile women and their clinical outcomes in IVF cycles. | Limitations: Low external validity, non-validated FFQ. Strengths: Large sample size, non-obese patients. |
Cohort |
Kermack AJ et al., 2020 [32] | United Kingdom | 18-41 years | 111 women |
Study the impact of increased dietary intake of omega-3 fatty acids, vitamin D, and olive oil for 6 weeks prior to IVF or ICSI on morphokinetic markers of early embryonic development. | Limitations: Short dietary intervention (6 weeks); limited external validity. Strengths: Study design, double-blind randomization, comprehensive sample follow-up. |
Clinical trial |
Salas-Huetos A et al., 2022 [30] | USA | 18-45 years | 245 men |
Investigate whether men’s adherence to dietary patterns promoted for the prevention of cardiovascular diseases is associated with semen parameters and outcomes of ART in their partners. | Limitations: Observational design, potential residual confounding factors. Strengths: Prospective design, comprehensive sample follow-up, consideration of intermediate and final outcomes, statistical adjustment for relevant confounding factors. |
Cohort |
Salas-Huetos A et al., 2023 [31] | USA | 18-45 years |
612 women | Investigate whether women’s adherence to dietary patterns (including MD) is associated with infertility treatment outcomes. | Limitations: Single-center study, potential residual confounding factors, limited external validity. Strengths: Prospective design, analysis of multiple dietary patterns, high standardization level of covariables, exposures, and study outcomes. |
Cohort |
Noli SA et al., 2023 [24] | Italy | 18-39 years | 296 women | Evaluate whether preconceptional adherence to MD can influence the risk of poor ovarian response in patients without criteria/risk factors for it. | Limitations: Cross-sectional design, self-administered dietary questionnaire, limited external validity. Strengths: Relatively large sample size, comprehensive statistical analysis. |
Cross-sectional |
Reference | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Noli SA et al., 2023 [24] | yes | yes | yes | yes | yes | yes | dk | yes | yes | yes | yes | yes | no | yes | dk | yes | yes | yes | no | yes |
Reference | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
---|---|---|---|---|---|---|---|---|
Vujkovic M et al., 2010 [25] | * | * | * | * | * | * | * | - |
Karayiannis D et al., 2018 [26] | * | * | * | * | ** | * | * | * |
Gaskins AJ et al., 2019 [27] | * | * | * | * | ** | * | * | * |
Ricci E et al., 2019 [28] | * | - | * | * | * | * | * | - |
Sun HM et al., 2019 [29] | * | * | * | * | ** | * | * | * |
Salas-Huetos A et al., 2022 [30] | * | * | * | * | ** | * | * | - |
Salas-Huetos A et al., 2023 [31] | * | * | * | * | ** | * | * | - |
Authors, Year | Determination of Adherence to the MD / Intervention |
Variables Analyzed to Determine ART Outcomes |
Results | Conclusions | Quality of Evidence (GRADE) |
---|---|---|---|---|---|
Vujkovic M et al., 2010 [25] | A 195-item FFQ with 22 food groups was used and adjusted for total energy intake. This was followed by a principal component analysis applied to the food groups to construct dietary patterns. Two patterns emerged: “health-conscious, minimally processed” and “MD” | 1) Fertilization rate 2) Embryo quality 3) Biochemical pregnancy |
The dietary pattern of the MD correlated positively with red blood cell folate (β=0.13) and vitamin B6 in blood (β=0.09) and follicular fluid (β=0.18). High adherence by the couple to the MD increased the likelihood of pregnancy (OR: 1.4). | A MD before conception by couples undergoing IVF/ICSI treatment contributes to the success of achieving pregnancy. | Low ⊕⊕⊝⊝ |
Karayiannis D et al., 2018 [26] | A questionnaire was used to assess adherence to the MD (PMD) previously developed by Panagiotakos et al., in 2007. | 1) Ovarian stimulation results 2) Fertilization rate 3) Embryo quality 4) Clinical pregnancy 5) Live birth |
Women in the lowest third of adherence to the MD had at least a 65% lower relative risk (95% CI) of achieving clinical pregnancy (p=0.01) and live births (p=0.01). No significant association of MedDietScore with intermediate study outcomes (ovarian stimulation results, fertilization rate, and measures of embryo quality) was observed. | Higher adherence to the MD is associated with a greater likelihood of clinical pregnancy and live births after IVF/ICSI treatment in non-obese women <35 years of age. | Low ⊕⊕⊝⊝ |
Gaskins AJ et al., 2019 [27] | Validated 131-item FFQ Subsequently, the Mediterranean Diet Score (MDS) was calculated to assess adherence to the MD. | 1) Fertilization rate 2) Number of mature oocytes 3) Implantation rate 4) Clinical pregnancy 5) Live birth |
Women in the second to fourth quartiles of adherence to the MD had a significantly higher likelihood of live birth compared to women in the first quartile. However, there was no additional benefit of adherence to the MD beyond the second quartile. Higher adherence to the “fertility-promoting” diet was linearly associated with ART outcomes. | No association was found between adherence to the MD and ART outcomes. However, higher adherence to the “fertility-promoting” (rich in folic acid, vitamin B12, vitamin D, pesticide-residue-low agricultural products, whole grains, dairy, soy foods, and seafood) diet was associated with a higher likelihood of live birth after ART. | Low ⊕⊕⊝⊝ |
Ricci E et al., 2019 [28] | Information was collected using a valid and reproducible FFQ. The FFQ included the average weekly consumption of 78 individual foods or food groups. Adherence to the MD was assessed using the MDS developed by Trichopoulou et al., (2003). | 1) Number of retrieved high-quality oocytes 2) Embryo quality 3) Clinical pregnancy 4) Live birth |
No significant association was found with the components of the MDS. | No clear association was observed between adherence to the MD and successful IVF. | Very low ⊕⊝⊝⊝ |
Sun HM et al., 2019 [29] | A 69-item FFQ was used, and then adherence to the Mediterranean Diet was evaluated using the Mediterranean Diet Score (MDS) developed by Trichopoulou et al., (2003). | 1) Available embryos 2) Implantation rate 3) Number of fertilized oocytes 4) Clinical pregnancy |
The group with higher adherence to the MD showed a greater number of available embryos (p=0.028). Clinical pregnancy rate and implantation rate were similar between the two groups. In additional correlation tests and multivariate linear regression analysis, the number of fertilized oocytes and embryo production correlated positively with participants’ adherence to the MD. | Infertile women with higher adherence to the MD pattern were likely to obtain more available embryos in the IVF cycle. | Low ⊕⊕⊝⊝ |
Kermack AJ et al., 2020 [32] | The study group received olive oil for cooking, a spread made from olive oil, and a daily complementary beverage enriched with EPA (800 mg), DHA (1200 mg), and vitamin D (10 μg). | Embryo quality (validated morphokinetic parameters of embryonic development associated with a higher probability of blastocyst development, implantation, and clinical pregnancy). | The 4th cell cycle was accelerated in the study group, and a significantly shorter synchrony of the 3rd cell cycle was observed, along with an increase in KIDScore (known implantation data scores) on day 3, indicating better embryo quality in the study group. | This study suggests that a short period of dietary supplementation alters the embryo’s division rate (improved embryo quality). Further research is needed to assess whether the impact on embryonic development translates into better clinical outcomes. | High ⊕⊕⊕⊕ |
Salas-Huetos A et al., 2022 [30] | Male pre-treatment dietary intake was assessed using a validated 131-item FFQ, from which three scores were calculated: (1) MDS, (2) AMD, (3) PMD. | 1) Fertilization rate 2) Implantation rate 3) Clinical pregnancy 4) Live birth |
There was a reverse association between men’s adherence to the PMD and the fertilization rate. However, there were no significant associations between men’s adherence to any of the analyzed dietary patterns and the odds of implantation, clinical pregnancy, or live birth in adjusted multivariable models. | Men’s adherence to various a priori defined dietary scores with documented cardiovascular benefits is not related to significant outcomes of ART. | Low ⊕⊕⊝⊝ |
Salas-Huetos A et al., 2023 [31] | Women’s pre-treatment diet was assessed using a validated FFQ from which three indices were calculated: (1) MDS, (2) AMD, (3) PMD. | 1) Clinical pregnancy 2) Total pregnancy loss 3) Clinical pregnancy loss 4) Live birth |
There was no association between women’s adherence to dietary patterns and the likelihood of clinical pregnancy or live birth after IVF or AI. | The findings of this study suggest that there is no association between adherence to the MD and ART outcomes. | Low ⊕⊕⊝⊝ |
Noli SA et al., 2023 [24] | A MD index (MDS) developed by Trichopoulou et al., (2003) was used and later modified for Italian dietary habits. | Poor ovarian response (retrieval of three or fewer suitable oocytes) in patients without criteria/risk factors for it | The risk of poor ovarian response was significantly lower for women in the second tertile of MDS compared to the first tertile (OR: 0.29) and for women in the second and third tertiles, grouped together, compared to the first tertile (OR: 0.34). | Low adherence to the MD could be a risk factor for poor ovarian response in patients without criteria/risk factors for it. | Low ⊕⊕⊝⊝ |
Disclaimer/Publisher’s Note: The statements, opinions and data contained in all publications are solely those of the individual author(s) and contributor(s) and not of MDPI and/or the editor(s). MDPI and/or the editor(s) disclaim responsibility for any injury to people or property resulting from any ideas, methods, instructions or products referred to in the content. |
Melanie McGrice
et al.
Nutrients,
2017
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et al.
Nutrients,
2018
Maria Coccia
et al.
IJERPH,
2022
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