In the case of small fetus, pregnant women can usually eat foods with high protein, iron, calcium, folic acid and vitamin content to promote fetal growth. However, the cause of the small fetus needs to be clarified first, and the cause should be treated in order to promote the growth of the fetus, not to blindly eat food to promote the long fetus. If the fetus is small due to the lack of nutrition of pregnant women can be improved by eating the following foods: 1, high protein food: including milk, eggs, soy products, fish, chicken, etc.; 2, iron-containing food: iron deficiency anemia is prone to occur during pregnancy, you can eat appropriate animal offal and animal blood products to help pregnant women replenish iron during pregnancy; you can also eat appropriate red meat, including beef, mutton, etc., can play a role in blood replenishment 3, calcium-containing foods: including meat, milk, shellfish and other foods, you can also take calcium tablets under the guidance of a doctor; 4, folic acid: such as oysters, spinach, cabbage, etc., can prevent fetal neural tube defects, you can also take oral folic acid, etc. Pregnant women should consume fresh, hygienic, low-fat, additive-free food to benefit the health of the fetus. During pregnancy, reduce the intake of high-calorie foods to avoid excessive obesity during pregnancy.