The usual diet can have a great impact on the quality of male sperm, and men need to pay special attention to their diet during pregnancy preparation in order to have a healthier and smarter baby. Men need to eat more foods with high protein content, foods with high mineral and trace element content, foods with high magnesium content, and foods rich in dietary fiber during pregnancy preparation. Protein is an important component of cells and an important material for generating sperm, so to improve the quality and vitality of sperm, the first step is to maintain sufficient high-quality protein, and in the usual diet you can eat more deep-sea fish and shrimp, oysters, a variety of soybeans, lean meat, eggs and other foods. You also need to eat more vitamins and mineral energy high food, such as green vegetables, shrimp and crab, kelp, various nuts, beef, lamb, etc. These foods also contain zinc, and zinc can significantly improve the quality of male sperm. Magnesium helps regulate human heart activity and can improve a man’s fertility. Foods containing high amounts of magnesium include soybeans, potatoes, walnuts, oatmeal, seafood and so on. In addition men need to eat more foods high in dietary fiber, such as a variety of fresh vegetables and fruits. In addition to dietary regimen, men also need to quit smoking and drinking during pregnancy preparation, ensure sufficient sleep, and strengthen physical exercise to keep their physical strength.