[Objective] Polycystic ovary syndrome (PCOS) , one of the most common endocrine diseases affecting women of reproductive age, plays an important role in anovulatory infertility, with a prevalence of up to 5%~21%; The main clinical manifestations include irregular menstruation (amenorrhea or infrequent menstruation or dysfunctional uterine bleeding), infertility, hirsutism, obesity and acanthosis nigricans. Elevated serum LH levels and hyperandrogenism, insulin resistance with compensatory hyperinsulinemia a...