Pregnant women need to take folic acid supplements after pregnancy. The main purpose of folic acid supplementation is to prevent neural tube abnormalities in the baby and to promote the development of the baby’s nervous system. In addition, folic acid is also useful for the formation of hemoglobin, so supplementation can also serve the purpose of preventing anemia. During pregnancy, the recommended dose of folic acid is between 0.4-1mg per day, which means that folic acid can be supplemented by oral folic acid tablets and diet, and the best supplemental dose is 0.8-1mg. The folic acid content of green leafy vegetables and animal liver is relatively high, so it is necessary to eat a little more during pregnancy. In addition, it is recommended to take folic acid until after the third month of pregnancy and to have a folic acid metabolism test.