1.Menstrual abnormalities Sparse menstruation, secondary amenorrhea, a few can be manifested as functional uterine bleeding. It mostly occurs in adolescence, as a continuation of irregular menstruation after menarche, sometimes accompanied by dysmenorrhea. 2. Hirsutism is more common, with an incidence of up to 69%. Due to elevated androgens, it can be seen that the hair on the upper lip, jaw, chest, back, middle of the abdomen, both sides of the upper thighs and the perianal area are thickened and increased, but the degree of hirsutism is not proportional to the androgen level (affected by various factors such as the number of bodies, estrogen, SHBG and the sensitivity of hair follicles to androgens). At the same time, it can be accompanied by acne, excessive secretion of facial sebum, low coarse voice, enlarged clitoris, the appearance of throat knots and other signs of masculinity. 3, infertility Due to long-term non-ovulation, patients are often combined with infertility, sometimes there may be occasional ovulation or miscarriage, the incidence of up to 74%. 4, obesity Weight more than 20%, body mass index ≥ 25 accounted for 30% to 60%. Obesity is mostly concentrated in the upper body and the waist/hip ratio is >0.85, mostly starting from adolescence and gradually increasing with age. 5, ovarian enlargement A small number of patients can be palpated through general gynecological examination, the texture of the enlarged, tough ovaries, most of them need auxiliary examination to determine. 6. Estrogen action All patients show good estrogen action. On examination, a high amount of cervical mucus is seen. Continuous and massive estrogen action without progesterone antagonism can result in excessive endometrial hyperplasia, leading to complex hyperplasia, atypical hyperplasia, and even cancer. The incidence of endometrial polyps is also significantly higher in patients with polycystic ovary syndrome than in the general female population.