Male friends who are preparing to have children, during your preparation or semen testing, you are advised to refer to the following recommendations: 1, drink more water, urinate regularly, do not hold urine 2, avoid sedentary, moderate exercise 3, at least 7 hours of effective sleep every night 4, avoid long-term exposure to high temperatures, high radiation, chemical toxic environment 5, avoid smoking and alcohol, avoid spicy, moderate amount of lean meat and eggs and other protein-rich food, but also moderate amount of Eat some deep-sea fish (swordfish, mackerel, etc.), less sea crab and shrimp, moderate consumption of vegetables and fruits 6, moderate consumption of dried fruit food (white melon seeds, walnuts, pistachios, cashew nuts, etc.) 7, pay attention to the regulation of emotions, avoid tension, anxiety and other adverse emotions 8, air-conditioned environment should pay attention to warmth, avoid catching a cold 9, sperm extraction (semen examination) should be 3-5 days before abstinence, while abstinence from smoking and alcohol during the period of abstinence. Avoid catching a cold and fever, avoid taking anti-inflammatory drugs, pay attention to rest and avoid straining