Abstract: Objective To investigate the obstetric outcomes of pregnant women with polycystic ovary syndrome (PCOS), and to analyze the related factors that affect the obstetric outcomes. Method Questionnaire method was used among 149 cases of pregnant women with polycystic ovary syndrome in our hospital from January 2014 to December 2016, and the information of age, body mass index, waist-to hip ratio, pregnancy complications, hormone level and the obstetric outcomes were collected and analyzed by using univariate and multivariate logistic regression.Results Among the 149 pregnant women with polycystic ovary syndrome, the incidence of adverse pregnancy outcomes was 34. 90% (52 cases), which including 34 spontaneous abortion, 9 premature delivery, 6 low birth weight and 3 neonatal asphyxia. The influencing factors of adverse pregnancy outcomes in pregnant women with polycystic ovary syndrome were body mass index, waist hip ratio, gestational diabetes and neo-hombreol F ≥ 45μg/L led to (P< 0. 05). However, age, infertility years, pregnancy hypertension and total gonadotropin using and luteinizing hormone < 5μg/L were not effecting the outcome of pregnancy in patients with polycystic ovary syndrome (P> 0. 05).Conclusion The incidence of adverse pregnancy outcomes in patients with polycystic ovary syndrome (PCOS) is high, so it is necessary to strengthen the monitoring and evaluation of risk factors, in order to adopt intervention method timely and improve women and children's health.