In terms of nutritional preparation before pregnancy, there are two common misconceptions: one is that many people think that the fetus is in the woman’s body before and after pregnancy, as long as women focus on nutrition, men can eat as they want, which has little impact on the fetus; the second is that people tend to focus on nutrition during pregnancy, ignoring the nutritional preparation before pregnancy, especially for the male partner. In fact, the nutritional status of men also has a very important impact on the fetus. Plan 1: Ensure adequate quality protein Protein is an important component of cells and an important raw material for sperm production. The proper supplementation of food rich in high quality protein is beneficial to coordinate the endocrine function of men and improve the quantity and quality of male sperm. High-quality proteins include deep-sea fish and shrimp, oysters, soybeans and their products, lean meat, eggs and so on. In particular, seafood is not only low in pollution, but also contains nutritional elements such as DHA and EHA that promote brain development and physical fitness, which is very beneficial to fathers-to-be. However, we should not go to extremes, many young men protein intake for a long time, it is easy to destroy the balance of nutrient intake in the body, resulting in insufficient intake of vitamins and other substances, which is very detrimental to conception. The second plan: reasonable supplementation of minerals and trace elements The minerals and trace elements in the human body also have a very important impact on male fertility, the most common are zinc, selenium and other elements. Zinc in the body can adjust the function of the immune system and improve the motility of sperm. Zinc deficiency can cause a decrease in the number of sperm, an increase in the number of deformed sperm, as well as reduced sexual and reproductive function, and even infertility; selenium deficiency can reduce the energy source needed for sperm activity, making sperm vitality decrease. Foods with high zinc content mainly include shellfish, offal of animals, cereal germ, sesame, shrimp and other foods. Foods with high zinc content mainly include seaweed, cuttlefish, shrimp, nori and other seafood. Plan 3: Do not underestimate the fruits and vegetables Fruits and vegetables contain a lot of vitamins that are necessary for male reproductive physiological activities. Some foods that are high in vitamins can be of great help in improving the viable quality of sperm. For example, vitamin A and vitamin E both have the effect of delaying aging and slowing down the decline of sexual function, and also have a good effect on sperm production and improving the activity of sperm. Lack of these vitamins can often cause disorders of spermatogenesis. Plan 4: moderate intake of fat Human sex hormones are mainly converted from cholesterol in fat, which also contains fatty acids needed for sperm production. If lacking, it not only affects sperm production, but may also cause a decrease in libido. Meat, fish and eggs contain more cholesterol, and their moderate intake is beneficial to the synthesis of sex hormones. But should eat less pork, can choose more fish, poultry food, especially more deep-sea fish. Plan five: strict abstinence from smoking and alcohol Smokers in the normal sperm count decreased by 10%, and sperm aberration rate increased. The longer you smoke, the more deformed sperm and the lower the sperm vitality. More than 90% of smokers have poor penile blood circulation and slowed erection. And excessive or long-term alcohol consumption can accelerate the breakdown of testosterone in the body, resulting in lower testosterone levels in men’s blood, reduced libido, sperm malformation and impotence.