It is also useful to take folic acid when you are pregnant. Folic acid is a drug that mainly prevents malformations in the development of the fetal neural tube, which develops within two months of pregnancy, so it is effective to take folic acid as long as it is taken within two months of pregnancy. Under normal circumstances, folic acid needs to be taken before the third trimester of pregnancy and can be taken until delivery, at least until the third trimester of pregnancy. If you don’t take it before pregnancy, you should take it orally as soon as pregnancy is confirmed, which can also effectively reduce the rate of fetal neural tube abnormality. Therefore, every pregnant woman should start taking folic acid during pregnancy preparation.