Once a male is sexually mature, the testes continue to produce sperm, and the testes can produce 70-100 million sperm per day. It takes 74 days for the spermatogonia in the testes to develop into sperm and about 12 to 25 days for the sperm to mature in the epididymis. Any disease or other factor that interferes with male reproductive function can cause male infertility. Semen testing is the most common and easiest way to determine male fertility, but the test is susceptible to many factors, so men should pay attention to the following points when doing semen testing: Abstinence for 3-7 days When coming to the hospital for semen testing, you need to be within 3-7 days of your last semen emission (including masturbation and dream loss). Less than 3 days or more than 7 days will affect the quality of sperm and thus affect the judgment. Insufficient abstinence (less than 48 hours) results in less mature sperm, and if the abstinence is too long (greater than 7 days) the number of dead sperm and deformed sperm will increase. If the ejaculation is not sufficient or the semen is thrown, it is recommended to do the semen examination on another day, otherwise the examination result will be affected. Avoid bad emotions Mood swings not only have an impact on sperm production, maturation and motility, but also on the semen in the Secretion also has an impact on sperm activity, which is extremely unfavorable to sperm activity and can greatly reduce the chances of successful conception. Serious bad moods may also cause premature ejaculation, impotence, or even non-ejaculation. Avoid high temperature environment Modern young people like to wear swimming trunks-like underwear, narrow and tight to the scrotum. Medical research has proven that tight underwear not only makes it difficult for body heat to escape, leading to bacterial reproduction, but also that the testicles’ long-term close proximity to the abdomen and femur can raise the temperature and affect sperm quality. In addition, sauna and bath will make the testicles in a high temperature environment for a long time, animal experiments have confirmed that the temperature in the scrotum increases 24 degrees Celsius, more than 24 hours will appear sperm production disorders, if the testicles in the environment of the temperature exceeds 45 degrees Celsius for two hours, that will hinder the sperm production. Therefore, you should avoid or minimize the time of bathing before semen examination. The number of abnormal sperm in the semen of smokers is significantly higher than that of non-smokers. Long-term excessive alcohol consumption can seriously affect the activity of the three acids used to synthesize male hormones in the body, so that the testes cannot produce male hormones and sperm normally. In addition, coffee, cola, strong tea and other beverages are also a harmful substance to sperm cells and should be avoided or consumed in moderation. Avoid sleep deprivation and fatigue If you have recently suffered from serious sleep deprivation and fatigue, it is recommended that you get enough sleep and rest before having a semen examination.