The choice of folic acid depends mainly on the folic acid content, and regular brands are fine. The choice of folic acid is mainly to prevent the emergence of fetal neural tube malformation, and there are many brands of folic acid, the brand is not particularly important, the important thing is the folic acid content. Women in the preparatory period, usually need to cooperate with the doctor oral folic acid, in the first trimester of pregnancy also need to supplement folic acid, and taking into account the dose of the drug, in the absence of folic acid deficiency, it should be strictly comply with the doctor’s instructions in accordance with the prescribed dose, you can choose the dosage of each tablet of folic acid is 0.4mg / d of the supplement can be supplemented to the first trimester of pregnancy. If the patient has a folic acid extreme deficiency, or itself has a folic acid deficiency of special diseases, then you need to be under the guidance of a professional doctor, according to the actual situation of the patient, to give medication supplementation therapy, do not pay too much attention to the brand of drugs.