Polycystic ovary syndrome (PCOS) is a complex endocrine and metabolic abnormality in women of reproductive age, characterized by chronic anovulation (disturbance or loss of ovulatory function) and hyperandrogenemia (excess production of male hormones in women), with the main clinical manifestations being irregular menstrual cycles, infertility, hirsutism and/or acne, and is the most common female endocrine disorder. It is the most common female endocrine disease. Clinical manifestations of PCOS PCOS causes anovulation or sporadic ovulation and is associated with menstrual disorders in about 70% of patients. The main clinical manifestations are amenorrhea, sporadic menstruation and gonorrhea, which account for 70-80% of women with menstrual abnormalities, 30% of secondary amenorrhea and 85% of anovulatory gonorrhea. Due to ovulatory dysfunction and lack of cyclic progesterone secretion, the endometrium of PCOS patients is stimulated by high estrogen for a long time, and the endometrium is prone to simple hyperplasia, abnormal hyperplasia, and even atypical hyperplasia and endometrial cancer. Androgen-related clinical manifestations Hirsutism: The amount and distribution of hair varies according to gender and race. Hirsutism is one of the important manifestations of androgen increase, and there are many clinical methods to evaluate hirsutism, among which the Ferriman-Gallway hair score is recommended by the World Health Organization. In China, the phenomenon of hirsutism in PCOS patients is not serious, and the results of large-scale community population flow survey show that mFG score >5 can diagnose hirsutism, and excessive sexual hair is mainly distributed in the upper lip, lower abdomen and inner thighs.