The birth of a healthy, smart, lively and lovely baby is your wish, but also the constant pursuit of medical workers, we know that the birth of a new life is the recombination of the genetic material of both parents, which requires us to do a good job of eugenics examination from the source, for men should pay attention to what aspects to protect their “seed”? We have the following suggestions for this: Keep your mood happy and try to create a happy and peaceful family atmosphere. Eat more green food, such as vegetables and fruits, etc. Hold more foods that promote sperm production and sperm vitality, such as walnuts, quail eggs, pollen, nuts and high-protein foods. Prohibit exposure to radiation such as X-rays, CT, MR, etc. for 3 months before conception is expected. Wear less tight triangular shorts, loose cotton products, etc. Go to high-temperature environments such as welding sites, processing stoves, saunas, etc. less often. Do not contact with toxic and harmful chemical products, such as pesticides, insecticides, etc. Do not casually use private medicine. Quit smoking and limit alcohol, and drink a small amount of better quality wine. Avoid pickled foods, celery, highly carbonated drinks, etc. You can take small amounts of vitamins E and C and sperm-friendly drugs such as those rich in zinc and selenium. Establish a scientific and regular sex life, such as arranging to have intercourse twice in the first week and three times in the second week after your wife’s menstruation is clean. The woman should not get up immediately after intercourse should lie flat for about 2 hours.