Before preparing for pregnancy, men should maintain sufficient intake of high quality protein, and can eat more fish and shrimp, which have less fat and higher protein content. At the same time, they should supplement with trace elements, especially zinc, which can promote sperm production and improve sperm quality, and can be taken together with vitamin E. It is recommended that men eat more lean meat or animal offal, which contain many raw materials for synthesizing human sex hormones and can improve the level of sex hormone synthesis. It is recommended to take vitamins before childbirth, you can simply take folic acid tablets orally, better there are multivitamins, such as Aleve, there are dosage form specifically provided for men to eat, you can also take it until you get pregnant, generally this condition is better. During the preparation of pregnancy should stop smoking, limit alcohol, strengthen physical activity, should eat more fruits and vegetables, facilitate the balance of nutrition, keep enough sleep, sperm quality are better.