Abstract
Background and Aims: Overweight/obese women with polycystic ovary syndrome (PCOS) have poorer pregnancy outcomes, compared to normal-weight women. Body mass index (BMI) is a risk factor of in vitro fertilization-embryo transfer (IVF-ET). This study is to compare the outcomes of IVF-ET between the overweight/obese and normal-weight women with PCOS. Method: We performed a retrospective cohort study in a large reproductive center of a university hospital. The participants were the women with PCOS who underwent IVF-ET. We compared live birth, miscarriage and other clinical outcomes between the women with BMI ≥25 (overweight/obese group) and 18≤BMI<25 (normal-weight group). Results: We included 3733 women with PCOS who underwent the first IVF-ET cycle from Jan 2016 to Dec 2020. 1693 of them were overweight/obese and had longer stimulation days and more doses of gonadotropins, while less numbers of oocytes retrieved and good quality embryos. Live birth rates were significantly lower in overweight/obese women, compared with normal-weight women (29.8% vs. 36.2%, OR 0.8 (0.7, 0.9)). Clinical pregnancy rates were significantly lower (38.5% vs. 43.0%, OR 0.8 (0.7, 0.9)). Miscarriage rates were significantly higher in overweight/obese women, compared with normal-weight women (21.5% vs. 14.6%, OR 1.6 (1.2, 2.1)). Multivariate logistic regression analysis showed BMI was an independent risk factor. Conclusion: Overweight/obese women with PCOS had poorer outcomes of IVF-ET, compared to normal-weight women with PCOS.
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