Folic acid comes in a box of over$20, less than$30, and a box of 31 folic acid tablets, 1 tablet once a day. It is recommended to start taking folic acid when preparing for pregnancy 3 months before conception and stop using folic acid until 3 months after conception. After the 3rd month of pregnancy, depending on individual financial conditions, it is recommended to stop taking folic acid and switch to a multivitamin containing folic acid after the 3rd month of pregnancy, if possible. Folic acid is recommended for pregnant women to prevent the occurrence of fetal neural tube developmental malformations, which include conditions such as spina bifida, anencephaly, and cerebrospinal bulge. Studies have found a relationship between the occurrence of these conditions and folic acid deficiency in pregnant women, so the state recommends starting folic acid in the first 3 months of pregnancy and continuing it until the second 3 months of pregnancy.