Infertility in women is mostly associated with polycystic ovary syndrome (PCOS), a heterogeneous endocrine disorder with a high prevalence in women of childbearing age.The diagnostic criteria for PCOS were standardized in 2003: the diagnosis of PCOS can be confirmed by the exclusion of other hyperandrogenic disorders (e.g., congenital adrenal hyperplasia, androgen-producing tumors, and Cushing’s syndrome, etc.) and by the fulfillment of any two of the following three criteria: 1. , sporadic ovulation and/or anovulation; 2, clinical manifestations of hyperandrogenemia and/or biochemical changes; 3, polycystic ovaries detected on ultrasound. Polycystic ovary syndrome occurs most often in women aged 20-35 years in their reproductive years. Beware of those with thick eyebrows and hairy lips, arms, mid-abdominal line, vulva, around the anus and lower limbs, especially women with hair growth around the areola. Clinically, polycystic ovary syndrome and obesity are found to be closely related, and some studies have found that obese patients have more serious endocrine metabolic disorders compared to non-obese patients. The impact of obesity on the clinical manifestations of polycystic ovary syndrome 1, hyperandrogenemia: androgen excess is a characteristic clinical manifestation of polycystic ovary syndrome, while obesity further increases the level of androgen. Clinically obese patients with polycystic ovary syndrome have more prominent hyperandrogenemia such as hirsutism, acne and acanthosis nigricans. 2, metabolic abnormalities: polycystic ovary syndrome itself and dyslipidemia and insulin resistance, but if combined with obesity at the same time will be more serious, manifested in lower levels of high-density lipoprotein, higher levels of triglycerides and total cholesterol, fasting or postprandial insulin concentration and glucose tolerance abnormalities in the proportion of increased, insulin sensitivity significantly reduced. 3, menstrual abnormalities and infertility: menstrual abnormalities and hirsutism are more prevalent in people with obesity, and some studies have shown that obese patients have a significantly lower ovulation response to pulsatile GnRH. 4, increased miscarriage rate: obese women and normal weight women, compared with the natural cycle and infertility treatment cycle of the conception rate are low, and has a high rate of spontaneous abortion. And overweight increases the difficulty of treatment of polycystic ovary syndrome. In summary, there is a close relationship between obesity and polycystic ovary syndrome, and the two induce each other to form a vicious circle. Therefore, weight loss is an effective and convenient treatment for obese polycystic patients. Losing weight and reducing adipose tissue content through proper diet and increased exercise can improve reproductive and metabolic abnormalities. Since there is a special period of time for women to gain weight, weight control should be practiced in a way that follows the special characteristics that different age groups have. 1, let’s start with puberty. Women in puberty need to pay attention to weight control. Because adolescent girls are prone to obesity, but also due to the period of physical development, even if you want to lose weight should not be messed up, do not believe that the prevalence of the Internet 21 days of fasting method, such as the method of lunch, the consequences of its adolescent girls is devastating. Based on the special characteristics of puberty, adolescent girls should strengthen physical exercise, with the secretion of endocrine hormones, to promote the rapid development and growth of the body. In the diet should pay attention to the matching of nutrients, more include protein, vitamins, minerals rich food, eat less food containing more fat, not only is conducive to physical development, but also to prevent obesity. For normal development of girls, do not overly pursue the so-called “slim”, so as not to affect their own health. 2, previously mentioned that women during pregnancy is very easy to get fat, the reason, I am afraid, is because many women adhering to the idea of all for the sake of the child, a large number of food intake during pregnancy, that “the more you eat, the healthier the baby,” and therefore often eat sugary or fat-containing foods, ultimately leading to their own weight gain is too much, even This will lead to excessive weight gain and even complications. If you want to control your weight during pregnancy, first of all, you need to limit the intake of fat, especially in the last 3 months of pregnancy. Secondly, the intake of sugary foods should be controlled. According to the dietary principles of active adjustment of diet, and appropriate increase in the amount of activity, do some of the ability to do housework, it is best to adhere to the daily after-dinner walk for about half an hour. Adhere to moderate exercise will not be bad for a smooth delivery. Fellow women, eat and drink well is certainly right, but do not overdo it. A little inattention may be obese, ruined the body is a small matter, if therefore suffered from gynecological diseases can be more than worth it. “Control your mouth, open legs”, take action!