Folic acid is usually taken during the preparation period or about 3 months before pregnancy, and it is recommended to start taking it during the preparation period. There are many brands on the market, and the more familiar ones to the public are Aleve, Silien and Amway Nutrilite. In fact, as long as it is folic acid, most of the ingredients are the same, just go directly to the pharmacy or hospital to buy it. And in many areas, under the national policy, folic acid is already available to mothers-to-be for free. It is well known that folic acid can prevent fetal neurovascular malformation, normal pregnant mothers take a small dose of it, usually 0.4-0.8 mg. In addition, there is a multivitamin containing folic acid, as long as the regular manufacturers and in line with national standards, can be safely selected.