A balanced diet is needed before pregnancy preparation, and it is recommended to eat folic acid or foods rich in folic acid, as well as foods rich in iron, calcium, high-quality protein, vitamins and minerals, as follows: 1. Folic acid or foods rich in folic acid: folic acid is a nutrient that must be supplemented during the preparation and the first three months of pregnancy, the main role of which is to prevent neural tube abnormalities, but also to prevent anemia in pregnant women, enhance the probability of conception and promote placental development, etc. It is recommended for both men and women. In addition to oral folic acid tablets, folic acid can be obtained from food, such as animal liver, spinach, lettuce, cabbage, pears, oranges, bananas, etc.; 2, rich in iron and calcium food: mainly shrimp, kelp, black sesame, etc. Not only pregnant women themselves need to supplement calcium, iron and other nutrients, the formation and development of fetal bones also need calcium, iron. Iron deficiency anaemia and calcium deficiency can easily occur in the middle and late stages of pregnancy, so it is necessary to supplement iron and calcium before preparing for pregnancy, especially for women with poor nutrition. 3. foods rich in high quality protein: mainly lean meat, fish, chicken, beef, eggs, milk, etc., which can not only replenish energy, but also improve sperm and egg vitality and increase the chance of conception. 4. foods rich in vitamins and minerals: such as melon, kale, cauliflower, carrots, etc., which can provide a good source of vitamins and minerals, 4. foods rich in vitamins and minerals: such as melon, kale, cauliflower, carrots, etc., which provide essential nutrients and improve the body’s immune system; 5. others: sufficient water is good for promoting the body’s metabolism and discharging harmful substances to provide a good growth and development environment for pregnancy. In addition, the preparation stage can also eat more bean food, bean food is a natural estrogen, can improve the female ovarian function, to promote ovulation.