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Impact of Metformin on IVF Outcomes in Overweight and Obese Women With Polycystic Ovary Syndrome: A Randomized Double-Blind Controlled Trial

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Abstract

Objectives: To evaluate the impact of metformin on in vitro fertilization (IVF) outcomes in overweight and obese women with polycystic ovary syndrome (PCOS). Methods: This was a randomized double-blind placebo-controlled study (ClinicalTrials.gov: NCT 02910817) carried out in a University IVF Center. The study included 102 overweight and obese women (body mass index [BMI] >24 kg/m2) with PCOS who underwent their first fresh autologous IVF-embryo transfer cycle and agreed to participate in the study. The study participants were randomized into 2 groups: metformin group received metformin (1000 mg per day) at the start of controlled ovarian stimulation (COH) until the day of the pregnancy check, and placebo group received placebo tablets in the same duration. The primary outcome measure was the total number of retrieved oocytes. Results: Both groups were homogenous in baseline demographic characteristics. Metformin group versus the placebo group demonstrated decrease in the mean number of the retrieved oocytes (9.06 ± 4.23 vs 16.86 ± 8.3, P <.01) and similar live birth rate (LBR; 25.5% vs 17.6%, P =.34). The number of fertilized oocytes was lower in the metformin group (5.65 ± 2.66 vs 9 ± 4.55, P <.01). However, the fertilization rate was similar in both groups (62.3% vs 53.4%, P =.10). There was no difference in the implantation rate (15.7% vs 11.8%, P =.32), multiple pregnancy rate (13.4% vs 3.9%, P =.08), or miscarriage rate (23.5% vs 35.7%, P =.46). No cases of ovarian hyperstimulation syndrome (OHSS) were observed in both groups. Conclusion: Short-term administration of metformin to overweight or obese women with PCOS undergoing IVF decreased number of the retrieved oocytes but did not improve the LBR.

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Acknowledgments

We thank the clinical and laboratory team in Assiut University IVF Center.

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Correspondence to Ahmed M. Abbas.

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Abdalmageed, O.S., Farghaly, T.A., Abdelaleem, A.A. et al. Impact of Metformin on IVF Outcomes in Overweight and Obese Women With Polycystic Ovary Syndrome: A Randomized Double-Blind Controlled Trial. Reprod. Sci. 26, 1336–1342 (2019). https://doi.org/10.1177/1933719118765985

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