1, avoid alcohol and tobacco smoke in the benzpyrene anthracene nicotine has a chromosomal aberration, alcohol can directly damage the testes; 2, avoid spicy food induced infection and inflammation of the reproductive system; 3, less celery, garlic has a spermicidal effect; 4, eat more fresh vegetables rich in vitamins seafood rich in carnitine; 5, eat more vitamin C-rich fruits such as bananas, tomatoes, grapes, oranges, etc.; 6, often drink tea rich in vitamins 7, avoid high temperature baths, sanna, cooks, boilers, bakers; 8, avoid radiation welding, X-ray photos, computers, radio communications, radio, microwaves; 9, avoid toxic contamination pesticides such as dibromochloropropane, paint, chemical plants, plastic manufacturing, batteries, solder; 10, avoid taking drugs harmful to fertility (1) chemotherapy drugs; (2) some antihypertensive drugs; (3) (4) excessive hormones; (4) antacid drugs; (5) immune drugs; (6) anti-epileptic drugs; (7) some antibiotics neomycin, erythromycin, gentamicin, urea, metronidazole, furacilin, sulfadiazine. 11, avoid sedentary, avoid underwear too tight resulting in poor local ventilation and scrotal heating; 12, avoid strain to avoid the decline of immune capacity; 13, maintain a calm and good psychological state; grasp the female ovulation period, to establish the best pregnancy period.