In order to adapt to the needs of pregnancy, such as uterus, breast enlargement, placenta and fetal growth and development, the nutritional needs of pregnant women must be higher than those of non-pregnant women. Poor nutrition during pregnancy will not only directly affect the growth of the fetus, resulting in incomplete organ development, fetal growth restriction and low birth weight, and affect future physical and intellectual development, but also easily cause miscarriage, premature birth, fetal malformation, and fetal death in the womb. In order to have a good birth, pregnant women should pay particular attention to pregnancy nutrition. 1, caloric energy: pregnant women’s caloric energy supply should be based on protein, fat, carbohydrates to 15%, 20%, 65% ratio. According to the custom of Han Chinese people in China, food should account for 65%, the remaining 35% from edible oil, animal food, beans and vegetables. 2, protein: pregnant women should increase the daily intake of protein 15 grams in 4-6 months of pregnancy (two more eggs per day can be eaten); in 7-9 months of pregnancy should increase the daily intake of protein 25 grams. 3, carbohydrates: after the middle of pregnancy, the daily intake of staple food 400-500 grams can meet the needs. 4, trace elements (1) iron: the main component of hemoglobin, but also a component of many enzymes, in the tissue respiration and biological oxidation process plays an important role. It is difficult to get the required amount from the diet during pregnancy, so take 0.3 grams of ferrous sulfate or 0.2 grams of ferrous fumarate orally once a day from the 4th to 5th month of pregnancy. (2) Calcium: mainly for the development of fetal bones and teeth, the daily intake of calcium should be 1000 mg from the 16th week of pregnancy and increased to 1500 mg in late pregnancy. As milk and milk products contain more calcium and are easily absorbed, it is recommended that pregnant women drink more milk and milk products. (3) Zinc: It is a component of protein and enzymes and is involved in the accumulation of protein, which is important for the growth and development of the fetus. If a pregnant woman does not consume enough zinc in the second trimester of pregnancy, the fetus will be in a low zinc state, which may lead to fetal growth restriction, miscarriage, congenital malformation and fetal death in the womb.