Infertility accounts for about 15% of married couples in China, and the trend is gradually increasing. When choosing a spouse, how to identify each other’s fertility is strong, “pregnancy” is good? Look at each other’s waistline! Scottish scientists recently found that obesity can affect the quantity and quality of sperm. In China, obesity can be visualized by the size of the waistline. Experts say that men with a waist circumference of more than 85 cm and women with a waist circumference of more than 80 cm should be careful about the impact on their “pregnancy”. The fatter the man, the lower the number of sperm Not long ago, the University of Aberdeen, UK Giace? Shayeb’s research team conducted a study to analyze the relationship between male body mass index (BMI, or body mass index) and sperm quality. The study analyzed the sperm of more than 5,000 Scottish men and divided these men into three groups based on body mass index (BMI): normal weight group (BMI = 20 to 25), overweight group (BMI = 25 to 29) and obese group (BMI > 30). The results showed that, excluding other factors that may affect sperm quality such as smoking, alcohol consumption, drug abuse and age, men in the normal weight group had higher levels of normal sperm, while men in the overweight and obese groups not only had less semen volume and sperm count than the normal group, but also had a significantly higher chance of having abnormal sperm, thus confirming that obesity does affect sperm quantity and quality. Why does obesity affect the quantity and quality of male sperm? Dr. Liang Zhong Kun pointed out that the current medical community tends to believe that obesity has three major “sins” in terms of interfering with fertility. 1, obese men increase the amount of body fat, can make androgens more into estrogen, estrogen is high, more than 1 times higher than the average male, and the latter and inhibit the pituitary gonadotropin secretion, and thus reduce testosterone secretion, which may hinder the generation of sperm and sperm quality. 2, obese men have more fat, so their body temperature is higher than normal. People’s normal body temperature is about 37 ℃, and the best temperature of sperm production than the normal temperature of 2 ℃ lower. Obese men have more fat, so their body temperature is higher than normal, which will directly affect the sperm production capacity of the testicles, resulting in reduced sperm production. Even if the number of sperm generation is not affected, but the quality of the sperm generated will be affected. 3, obesity can cause diabetes or hidden diabetes, higher levels of sugar in the blood can damage the DNA in the sperm, and therefore affect male fertility. According to Liang Zhong Kun, Cohen of Queen’s University Belfast? In treating 40 men with diabetes who were not overweight, the Maridis team found that, as a result of diabetes, the patients had higher levels of sugar in their blood, which consequently damaged the DNA in their sperm. The researchers found that sperm damage was twice as likely in diabetics as in normal men who did not have diabetes. Changes in sperm DNA can lead to lower pregnancy rates, a higher risk of miscarriage, and may result in some serious birth defects. The impact of obesity on female fertility is not insignificant either. Obesity can put women at increased risk of metabolic syndrome, breast cancer, gynecological tumors, and if obesity is associated with endocrine disorders, women are also prone to ovulation disorders, which are inherently less likely to result in successful conception. Fat men married to thin women, fertility can be “compensated” Some people may use the example of their friends to question: some people are indeed obese, why can normal fertility? “At present, researchers cannot confirm that obesity necessarily causes infertility, because infertility is influenced by both male and female factors.” Dr. Liang Zhong Kun, a specialist in reproductive endocrinology in the Department of Gynecology at Sun Yat Sen Memorial Hospital of Sun Yat-sen University, pointed out that some studies have shown that if an obese man marries a normal woman, the fertility function of the obese man will be compensated by the other side, and therefore, it does not necessarily lead to infertility. However, if an obese man combines with an obese woman, their obesity will be superimposed and create an amplifying effect, resulting in infertility. Researchers have found that a normal woman’s egg has a certain degree of ability to repair sperm damage, and an obese man’s sperm may be repaired, or may lead to miscarriage or abnormal fertilization if the sperm DNA damage is too great and may exceed the egg’s ability to repair it. The obese man combined with an obese woman, or the woman’s egg quality itself is not good enough to repair the DNA damage to the sperm, thus causing infertility. The body has three types of fat: fat in the blood, subcutaneous fat, and omental fat. “Human fat is largest in this area of the abdomen, the greater omentum. Fat is the first to accumulate at the greater omentum and affects waist circumference changes.” C.K. Leung pointed out that the fat accumulation in the organs of the abdominal cavity can also be directly reflected in the shape of the waist and abdomen. The size of waist circumference, therefore, can be an important indicator of obesity. In China, the appropriate number of waist circumference for adult men is 85 cm, women are 80 cm, once beyond this standard, the risk of cardiovascular disease, diabetes and other chronic diseases will greatly increase, and, by the same token, fertility will be reduced accordingly. The first thing you can do is to reduce your weight before you try to make a baby. On the one hand, through lifestyle adjustments, diet control and exercise to reduce weight, can improve the success rate of pregnancy, on the other hand, many fat people usually lack exercise, physical strength, and October pregnancy and postpartum breastfeeding, the physical requirements of women are very high, preparation for pregnancy, active exercise, to help reserve sufficient physical strength. If you are not considering having children, experts recommend that fat people should use condoms to prevent pregnancy. As “fat brothers” and “fat girls” accumulate more fat in the abdomen, condoms tend to fall off in the friction, resulting in contraceptive failure. If it’s a “fat man + thin woman” pairing, it’s recommended to take the female on male position, while the “fat woman + thin man” pairing is appropriate to take the female on male position. If you want to use oral contraceptives, you should be aware that obesity has the risk of causing contraceptive failure. Oral contraceptives can be “blocked” by fat in obese women, resulting in a lack of potency and a slower onset of action in the body than in normal-weight women. For example, it takes about 5 days for oral contraceptives to take effect in normal weight women and about 10 days in overweight women (i.e., BMI ≥ 30). Therefore, it is best for obese women to evaluate the appropriate amount of birth control pills for them under the guidance of their doctor.