Normal women without folic acid deficiency do not need to take folic acid throughout pregnancy, they should start taking it when they are preparing for pregnancy and stop taking it until the 3rd month of pregnancy. Folic acid is a medicine to prevent fetal malformations. Adequate folic acid supplementation can prevent fetal neural tube development malformations. After that, you can eat more fresh vegetables and fruits to supplement folic acid to achieve the necessary components for fetal growth. During the whole pregnancy, you need to enhance nutrition and eat more protein-rich foods, such as milk, lean meat and egg yolk, which are good for promoting the growth and development of the fetus.