(1) IT industry in the IT industry, most men have such “professional habits”, get up early to work, sitting in front of the computer is a day, and then go home to sit in front of the computer or TV for hours; work when you can not care to drink water, there is no time to urinate to the bathroom; often stay up late, daily contact with the computer for at least 8 hours. This lifestyle makes men often in a sedentary, holding urine. The state of exposure to radiation and so on, so that the testicles local temperature increases, prone to prostatitis and affect the testicles sperm function decline. The actual fact is that you can find a lot of people who are not able to get a lot of money to spend on their own. (3) Chemical workers chemicals are mainly found in plastic and plastic foam (white pollutants), detergents, asphalt, chemical-based decorative products and other substances. They mainly contaminate water and enter the food chain through water, affecting the development of sperm, which in turn affects human fertility. (4) engineering staff engineering staff are in a high degree of tension for a long time, from the equipment, laboratory equipment and other aspects of radiation has a strong “spermicidal” ability. The impact of electromagnetic radiation on the reproductive system is mainly manifested in the reduction of male sexual function, reduce sperm quality, if receiving high doses of radiation exposure can cause chromosomal aberrations in sperm.