Polycystic ovary syndrome (PCOS) is the most common endocrine disorder in women, with a prevalence of 5-10% in women of childbearing age, and about 50% of PCOS patients are obese. Currently, there are many studies on obesity in PCOS patients, such as the effects of obesity on gonadal hormone levels, dyslipidemia, and glucose metabolism in PCOS patients, etc. Obesity in PCOS is mostly characterized by abdominal obesity. Obesity affects the development and treatment of PCOS. Reproductive dysfunction is the main problem faced by women with PCOS in reproductive age, and how to treat it can improve the ovulation rate and pregnancy rate of infertile patients with PCOS has become a common concern for doctors and patients. The main cause of infertility in PCOS is ovulatory dysfunction, and obesity may affect female reproductive function by aggravating hyperandrogenemia and hyperinsulinemia, increasing the release of luteinizing hormone, and releasing various adipokines. Treatment of obese PCOS infertility patients The first and most important thing is diet and lifestyle modification to control the diet and appropriate exercise is the first choice to restore reproductive dysfunction in obese PCOS patients. In overweight and obese PCOS patients, diet and exercise, alone or in combination, may improve reproductive function by enhancing insulin sensitivity. Studies have shown that exercise combined with controlled diet therapy for 6 weeks can increase ovarian response to clomiphene and increase ovulation rates in overweight and obese PCOS patients. How to exercise scientifically Ask patients to make their own weekly scientific exercise program, such as walking, jogging, dancing, playing tai chi, swimming, etc., 3 or 4 times a week, 30-60min each time, and record it on the self-weight management chart. Starting from a low level of exercise, gradually increase the intensity of exercise, encourage the choice of aerobic exercise, calculate the number of calories consumed according to the formula based on the chosen exercise and the time of tolerance, and determine the daily activity level according to the fact that an additional exercise consumption of 500 kcal per day on top of the daily routine can reduce the body weight by 0.5 kg in 1 week. For example, a patient with a height of 160 cm and a weight of 65 kg, a clerk (light physical labor), the scientific exercise plan is as follows: calculate the body surface area of 1.71 m222; according to the checklist of energy consumption of various activities, choose to play table tennis consumption coefficient of 2.380 kcal/m2/min, the exercise consumption of 500 kcal energy, and the need to play table tennis for 2 hours a day. It was found that a weight loss of about 6 kg within 6 months in obese women can significantly reduce fasting insulin and androgen levels, improve insulin sensitivity, and hopefully restore spontaneous ovulation. Therefore, while adhering to rational drug treatment, strengthening self-management of body weight and promoting patients to change their lifestyles can more effectively control body weight to restore spontaneous ovulation and promote regular menstrual cycles.