How do you know if you need folic acid?

Folic acid supplements are routinely given during pregnancy preparation, that is, from the first 3 months of pregnancy to the third month of pregnancy. Folic acid supplements are given in doses of 0.4-0.8mg per day, or dietary supplements containing adequate amounts of folic acid. There are many multivitamins, as long as they contain 0.4-0.8mg of folic acid. There is no need for special testing for folic acid deficiency. Folic acid supplements are routine. Folic acid deficiency can cause fetal nervous system development abnormalities, may cause fetal anencephaly, encephalocele, spina bifida and other neural tube defects, so routine to supplement, do not need to carry out folic acid deficiency test. If you want to know whether the body is deficient in folic acid can also be blood tests, can check folic acid and vitamin B12 to determine whether there is megaloblastic anemia.