The TT type of folic acid gene suggests that the enzymatic activity of folic acid is relatively low, only 30% or even a little lower, suggesting that the absorption rate of the body for folic acid is also not particularly good and is very poor. Therefore, at this time, if you are pregnant or are already pregnant, you should take folic acid orally in high doses under the guidance of your doctor to avoid the problem of folic acid deficiency, which may cause congenital heart disease, anencephaly or cleft lip, which are some obvious malformations. When taking folic acid orally, it is not the same time as normal women take it orally, because it must be taken orally until the end of labor. There may also be adverse reactions to folic acid during oral administration, causing yellow urine or dark green stools. As far as possible, observe the situation first, usually this will not affect the health, as far as possible, also drink more water to accelerate the metabolism of folic acid.