1, avoid tobacco and alcohol (cigarette benzo(a)pyrene anthracene nicotine chromosomal aberration, alcohol can directly damage the testicular spermatogenic function); 2, avoid spicy food (induced reproductive tract infections and inflammation); 3, less celery, garlic (with spermicidal effect); 4, more fresh vegetables (rich in vitamins), seafood (rich in carnitine); 5, more vitamin C-rich fruits (such as bananas, apples, tomatoes, grapes, oranges, etc.); 6, often drink tea (rich in vitamins, antioxidants); 7, avoid high temperature (bath, sanna, cooks, boilers, bakers); 7, avoid high temperature (baths, sanna, cooks, boilers, bakers); 7, avoid high temperature (baths, sanna, cooks, boilers, bakers, bakers). 6, often drink tea (rich in vitamins, antioxidants); 7, avoid high temperatures (baths, sauna, cooks, boilers, bakers and other high-temperature environmental operations of the work); 8, avoid radiation (welding, X-ray photographs, computers, radio communications, radio, microwave); 9, to avoid poisonous contamination (pesticides such as dibromochloropropyl, paints, chemical workshops, plastics, batteries, solder, hair dye). Welding tin, hair dye); 10, avoid taking drugs harmful to fertility: (1) chemotherapy drugs (2) some antihypertensive drugs (3) excessive hormones (4) antacids (5) immune drugs (6) anti-subclamptic drugs (7) some antibiotics (neomycin, erythromycin, gentamycin, urea, metronidazole, furacillin, sulfadiazine pyridine); 11, to avoid sitting for a long time, to avoid too tight underwear (resulting in poor ventilation and increased temperature of the scrotum). Poor ventilation and scrotal temperature rise); 12, to avoid fatigue, to avoid the body’s immune function decline; 13, to maintain a good and peaceful psychological state; 14, to grasp the female once a month ovulation (about 14 days before menstruation), to establish the best pregnancy period.