To check whether a patient has polycystic ovary syndrome, the main methods are as follows: Firstly, gynecological ultrasound. Patients with polycystic ovary syndrome tend to have larger ovaries, the volume of a single ovary is greater than 10 ml, and there will be multiple immature follicles, usually in a unilateral ovary, with more than 10 follicles of 2-9 mm in diameter. Second, check the sex hormone panel, which indicates that the patient’s androgens are high and that luteinizing hormone is about 2-3 times more than follicle stimulating hormone. Thirdly, monitor the patient’s body temperature, which is usually unidirectional, and more often than not, there is no ovulation. Fourth, combined with the patient’s clinical symptoms, the patient mostly has clinical manifestations such as scanty menstruation, non-ovulation, infertility or obesity, acanthosis nigricans and acne. Also, patients with polycystic ovary syndrome are insulin resistant and need to check the patient’s blood sugar.