Electromagnetic radiation is everywhere, and fathers-to-be should be aware that this radiation can affect your sperm. Electromagnetic radiation is a composite electromagnetic wave that transmits energy in mutually perpendicular electric and magnetic fields over time. Human life activities contain a series of bioelectric activities, these bioelectricity is very sensitive to the electromagnetic waves of the environment, therefore, electromagnetic radiation can cause impact and damage to the human body. Long-term severe electromagnetic radiation threatens the reproductive and immune systems of the human body. In daily life, there are many sources of radiation, including microwave ovens, cell phones with high-frequency radiation, television sets, air conditioners, computers, etc. with low-frequency radiation. It is worth noting that: hairdryer operation when the amount of radiation generated in the top of the household appliances. According to the survey found that different brands of cell phones in standby and dialing when the low-frequency radiation generated is not the same. However, in the standby state, the difference is not significant, and in the calling and called state, it also basically floats in the same area. Electromagnetic radiation may affect the human reproductive system, mainly in the form of reduced sperm quality in men. Male germ cells and sperm are more sensitive to electromagnetic radiation. Therefore, men should minimize contact with electromagnetic waves too frequently and intensively, and also keep a safe distance, usually more than half a meter, when in contact. In general, the effect of electromagnetic radiation on pregnancy is usually in the first trimester, and varies from individual to individual. Therefore, IT workers or senior pregnant women who have had a pre-eclampsia miscarriage should try to reduce their computer time in the early stages of their next pregnancy, and then resume computer use after 3-4 months of pregnancy.