With the accelerated pace of life, work pressure, irregular diet and the temptation of food, more and more people have entered the ranks of obesity (body mass index greater than 24), according to incomplete statistics, the rate of obese people fluctuates from 5%-30%, in some developed countries and even higher. Obesity brings a series of complications, life actions, health threats, such as three high people, the number of deaths caused by obesity is gradually increasing every year, and obese people are getting younger and younger, extending to children. This seriously affects our physical health. First, obesity and male infertility According to foreign authoritative magazines: male obesity and erectile dysfunction (ED) has an inextricable link. The study investigated 2435 cases of ED patients, found that 41.5% of them are normal weight, 42.4% of them are overweight, 12.1% of them are obese, and another 4% are seriously obese. This shows that “obesity has become an ‘accomplice’ to male ED. Obesity can also lead to a decline in male sperm quality, according to the survey BMI normal men have a higher level of normal sperm, while overweight and obese people not only have less semen volume (sperm count), but also a small number of normal sperm. This is because fatty tissue contains a substance called aromatase, which converts androgens into estrogens. Obese people have more aromatase in their bodies and produce more estrogen, which leads to hypogonadism and affects sperm quantity and quality. In addition, the normal body temperature of a person is about 37°C, and the optimal temperature for sperm production is 2°C lower than the normal temperature. Obese men have more fat, the fatty tissue near the testicles is too thick will cause the temperature of the scrotum to rise, directly affecting the spermatogenic ability of the testicles, and the sperm activity rate will also decline. Second, obesity for female infertility Obesity not only makes women lose physical beauty, but also brings endocrine disorders, such as metabolic disorders, menstrual disorders, some of them will occur infertility. Recent studies have concluded that the main cause of infertility in obese people is ovulation disorder. For example, weight loss of 5-10% in obese patients with polycystic ovary syndrome (PCOS) often restores ovulation, and weight loss can also increase the sensitivity to drug-induced ovulation. In addition obesity will affect the quality of the eggs, which will affect implantation and even eventually lead to unavoidable miscarriage. Studies have found that after spontaneous conception, obese women have a significantly higher risk of early miscarriage [ratio (OR) 1.2] and recurrent miscarriage [OR 3.5] than normal weight women. Several studies surface that pre-pregnancy obesity increases the risk of unexplained fetal death, even in women without medical or obstetric complications. The risk of congenital fetal anomalies such as spina bifida, neural tube defects, and cardiovascular anomalies is also higher in obese women, while the mother is susceptible to adverse outcomes such as gestational diabetes, severe preeclampsia, and postpartum hemorrhage.