Men and women preparing for pregnancy need to do a good job of diet, life, exercise, emotions and other aspects of conditioning, physical health checks. 1. Diet: During the preparation for pregnancy, the diet should try to eat more cabbage, tomatoes, apples and other seasonal fresh vegetables and fruits, milk, yogurt and other dairy products, eggs, goose eggs and other egg products, lean pork, chicken, beef and other meat products, but also eat a moderate amount of coarse grains and mushroom food. 2. Life: in life, quit smoking and drinking, regular routine, have enough sleep, avoid often stay up late. 3. Exercise: Do appropriate physical exercise. 4. Emotions: maintain an optimistic and relaxed mood, avoid excessive emotional tension and anxiety. 5. Physical health examination: men and women need to carry out genital examination, blood analysis examination, urinalysis examination, liver and kidney function examination, blood coagulation full examination, ultrasound examination, etc. Women also need to carry out secretion examination. Through these examinations, we can understand the physical health of both men and women, which is conducive to eugenics.