Modern people are concerned about eugenics, in order to have children before the man to “seal the mountain forest”, is not drinking, which has also become a drink at the table to block the word. It is true that alcohol can affect the quality of sperm. However, although it is said that tobacco and alcohol are not separate, but there are still many men only quit alcohol and not quit smoking. In the first national symposium on Chinese reproductive medicine, Professor Shang Xuejun of the General Hospital of Nanjing Military Region reminded that smoking can also harm sperm. Studies have shown that smokers have significantly lower sperm density, sperm activity rate, and normal form sperm rate than non-smokers. A hot bath or a sauna is a comfortable and relaxing experience for many men. However, inappropriate heat can cause serious damage to the testicles, the most important organ in men. In a foreign study, male animals were subjected to a high temperature of 38.5°C for 55 minutes and were subsequently found to have significantly reduced mating and fertility. Professor Shang Xuejun said that the most suitable temperature for sperm production is 35.6°C to 36°C. A temperature of more than 37°C will damage it, firstly affecting the spermatogenic cells, and long-term high temperature will cause irreversible damage to fertility and even affect the androgen-producing testicular interstitial cells, which in turn affects male sexual function. The scrotum itself has a good heat dissipation function, so the temperature of the testicles in the scrotum is 1°C to 2°C lower than the body temperature, but frequent hot showers and saunas can make the testicles too hot and affect sperm production. Shang Xuejun suggests that men should not take hot baths or saunas too often, and the water temperature should be around 34°C, and the time should be 15 to 20 minutes each time. For men who have fertility requirements, it is best not to take a sauna for six months. In addition, sedentary, driving will also affect the quality and quantity of sperm, office chair cushions are soft, the scrotum, including testicles are compressed, not conducive to blood circulation and heat dissipation of the scrotum. In this environment of minimal change in body position, the scrotum is susceptible to excessive heat, thus affecting the sperm production function of the testicles, so it is best to get up half an hour and move around. Mr. Zhao recently had a cold and fever of 39 degrees Celsius, and the plan to have children had to be postponed at the reminder of the doctor. It is understood that a study has confirmed that if there is a fever of more than 38.5 ℃, the inhibition of sperm can last for 6 months. Men who often face the computer pay attention, said Professor Shang Xuejun, the incidence of infertility in men with long-term exposure to computers is significantly higher, probably due to the impact of electromagnetic radiation on the reproductive system. A recent study by foreign scholars found that prolonged use of cell phones can lead to a decrease in the number of sperm, sperm vitality, and this effect is exacerbated by the increase in the time spent using cell phones every day. Therefore, the reporter found in the men’s clinic, encounter with men with little sperm weak sperm patients, doctors will advise less use of computers and cell phones. Emotional tension can also affect sperm quality. Professor Shang Xuejun once conducted a study on a prisoner awaiting execution who had just impregnated a woman before his arrest, proving that his spermatogenic ability was normal, but a biopsy of his testicles did not reveal a single sperm. This indicates that the fear of death has extremely reduced the spermatogenic function of the testicles. The expert explained that mental tension can affect reproductive function through the action of the neuroendocrine system, so learning to self-regulate emotions and keeping a relaxed mood will be beneficial to eugenics. Professor Shang Xuejun also suggested that the phenomenon of male infertility caused by inflammation of the reproductive tract is becoming more and more common, including both common infections and STD infections. In recent years, the prevalence of STDs in China has reached a very serious level, and the resulting damage to the reproductive system is alarming. Clinical surveys show that this alone causes nearly 20% of male infertility. Beware of other sperm killers: 1. Avoid radiation. The epididymis is very sensitive to X-ray exposure. The sperm stored in the epididymis are mature sperm, which will become deformed when exposed to X-rays. 2. Avoid toxic contamination. Less exposure to pesticides such as dibromochloropropane, paints, batteries, solder, and stay away from plastic manufacturing. 3, avoid taking drugs that are harmful to fertility. Such as chemotherapy drugs, certain antihypertensive drugs, excessive hormones, antacid drugs, immune drugs, antiepileptic drugs and some antibiotics such as neomycin, erythromycin, gentamicin, metronidazole, furacilin, lutjan sulfadiazepine. 4, avoid spicy food, eat less celery, garlic (spermicidal effect). 5, formaldehyde and other decoration pollution gas, lack of vitamin A, taking estrogen and drugs, are not conducive to sperm production.