If there is a brownish discharge during early pregnancy when taking folic acid, it usually has nothing to do with folic acid, but just because it happens to coincide with bleeding. This kind of bleeding is still generally caused by preeclampsia, because the condition of the fetus is not particularly stable in early pregnancy, if the rest is not good, or the embryo itself is not particularly good quality, it is easy to lead to preeclampsia. The function of folic acid is to promote the development of the nervous system of the fetus and prevent neural tube malformation. It can also promote the formation of hemoglobin and prevent anemia, so folic acid will not increase the risk of miscarriage, on the contrary, folic acid can also increase the probability of conception. So if there is a brown discharge, you should not stop folic acid, or go to the hospital for examination and birth control.