Abstract: Polycystic ovary syndrome（PCOS） is the most common endocrine disorder in women of reproductive age. The disease is associated with many characteristic features, including hyperandrogenaemia, insulin resistance and hyperinsulinism which may influence the pregnancy outcomes and induce more obstetric diseases such as spontaneous abortion, gestational diabetes mellitus and pregnancy induced hypertension disease. It has great clinical significance to explore the characters of PCOS in pregnant women.

Key words: Polycystic ovary syndrome, Obstetric complications, Insulin resistance