Men should quit smoking and drinking 3 to 6 months before pregnancy. Eating more high-protein foods, such as eggs, lean meat, milk, fish and shrimp, can increase protein in the body, improve sperm quality, and also need proper exercise to enhance physical fitness. It is best to eat nuts with food, and you can supplement zinc, such as melon seeds, walnuts, almonds and pecans. , are very good food. When preparing for pregnancy, the frequency of sexual intercourse should not be too frequent. It is best to choose sex for 3-5 days 1 time, which can improve the quality and quantity of sperm and increase the chances of pregnancy for women.