You can take folic acid all the time during pregnancy, this is for people with low folic acid metabolism level, if the folic acid metabolism is normal, you don’t need to take it all the time. It is generally recommended to take folic acid 3 months before pregnancy, until 12 weeks of pregnancy, during which is an important period of folic acid supplementation, after 12 weeks the fetus is basically formed, folic acid metabolism is normal to continue to folic acid supplementation is relatively small, so it is generally recommended to 12 weeks. However, if the metabolism is lower than the normal level after 12 weeks of folic acid test, then folic acid supplementation is needed to promote the normal development of the fetus. To check folic acid metabolism, it is necessary to consult a doctor in a timely manner and take folic acid according to the doctor’s instructions after the test, and not to decide whether or not to use it and the specific dosage on your own.