Here for you to collect some of the male fertility has harmful habits: Paint: paint contains a large amount of formaldehyde, toluene various heavy metals, these will cause serious harm to male health. Long-term exposure to paint is recommended: (1) wear a mask. (2) Reduce the time of bare skin. (3) need to wash the skin in a timely manner after use (4) newly renovated houses to be ventilated for more than 3 months (summer ventilation time to be longer than the winter time) Smoking: Cigarettes have a very great impact on sperm, containing 70 kinds of carcinogenic substances. People who smoke for a long time have more DNA fragments in their bodies, which can lead to miscarriage. Smoking also causes impotence, the incidence of impotence in smokers is twice as high as in non-smokers! Smokers account for 60% of impotence patients in China. It is recommended to have a baby three months after quitting smoking! Jeans: (1) The scrotum has the function of automatic elevation, when the weather is hot, the scrotum will automatically make the testicles farther away from the body so as to maintain the appropriate temperature of the testicles-34 ℃, when the weather becomes cold, the scrotum will make the testicles automatically contracted, close to the body so as to maintain the optimal temperature. (2) When wearing tight jeans, the role of elevation is gone, coupled with the thicker texture of jeans, not conducive to heat dissipation. Come to see a set of experiments: 33 ℃, a volunteer wearing jeans activities for 1 hour, the inner thigh root temperature up to 40.3 ℃. (I suddenly remembered a friend who likes to wear tight pants, hurry to remind him!) Bath: Testicles outside the body, the appropriate temperature is 34 ℃, testicular temperature is too high easily lead to malformed sperm production. Soak in a hot bath for 20 minutes, the temperature of the testicles is 43.4 ℃. Frequent hot baths and saunas will pose serious threats to the health of sperms. The safest and most sensible way is to shower! Mumps: A disease that children often get. The structure of the parotid gland and the testicles are very similar, and inflammation of the parotid gland produces a virus that attacks the testicles. 10-25% of children with mumps are prone to secondary testicular infections. Untreated mumps can affect the function of the testicles. How to test the quality of sperm: 1, go to the hospital 2, rough judgment ① normal semen is milky white, there is a smell of garlic. ② yellow semen: long time without ejaculation or inflammation. ③ red semen, hematoma: the most common cause of hematoma is seminal vesiculitis, in addition to hematoma cysts, stones in the seminal vesicles, men overly fatigued when having sex can appear the symptoms of hematoma.