Generally speaking, folic acid is not recommended to be taken until birth. From the perspective of eugenics, it is recommended that pregnant women of childbearing age should just take oral folic acid from 3 months before pregnancy to 3 months in early pregnancy to prevent fetal neural tube malformation. Folic acid is a water-soluble vitamin that can be synthesized in the body’s own intestinal tract, and is also found in some plant and animal foods, such as offal, eggs and milk, and fava beans. A lack of folic acid during pregnancy can easily lead to the risk of neural tube malformations in the fetus, so it is necessary to supplement folic acid in the early stages of pregnancy when there may be insufficient intake of folic acid. In the later stages of pregnancy, the folic acid content in food is generally sufficient to meet the needs of pregnant women and fetuses, so under normal circumstances, there is no need for additional supplementation. However, if there are abnormalities such as folic acid metabolism disorder or folic acid anemia, then it is recommended to consult a doctor in time and follow the doctor’s instructions to supplement. In addition, please strictly follow the dosage, oral consumption of large doses of folic acid, can affect the absorption of other trace elements.