Abstract: Polycystic ovary syndrome（PCOS） which mainly affect women of reproductive age can cause endocrine and metabolic disorders. Its clinical manifestations are multifarious and heterogeneous. obesity， peripheral insulin resistance and impaired beta cell function are common in patients with PCOS， which increase the incidence of glucose intolerance and diabetes. Moreover， PCOS often accompany with dyslipidemia and hypertension. All these amplify the risk of pregnancy complication such as gestational diabetes and pregnancy induced hypertension syndrome. This paper reviewed the impact of PCOS on pregnancy complication and newborn outcome.

Key words: Polycystic ovary syndrome, Phenotype, Pregnancy outcome, Pregnancy complications, Infant, newborn, Obesity