You still need to take folic acid if you are pregnant. It is generally advocated to start taking folic acid from 3 months before conception and take it at least until 3 months of pregnancy. The main reason for taking folic acid during this period is to prevent fetal neural tube malformations, as the fetal neural tube is well developed during this time. The amount of folic acid supplementation during this period should be between 0.4mg-0.8mg per day, and genetic testing for folic acid metabolism can also be performed to see if there is any folic acid metabolism disorder. If there is a disorder of folic acid metabolism, increase the amount of folic acid supplementation, or if you have had a fetus with neural tube abnormality in the past, also increase the amount of folic acid supplementation. If you have had a bad pregnancy before, you should consult your doctor to see if you should increase the amount of folic acid. Generally, it is 0.4mg-0.8mg, at least until the third month of pregnancy, and you can continue to take it after the third month of pregnancy. Because folic acid is also a kind of vitamin, it can also prevent anemia caused by folic acid deficiency, etc.