Q: Why should I take folic acid supplements before pregnancy? How to supplement? A: Early supplementation of folic acid can reduce fetal neural tube defects, reduce cleft lip, reduce congenital heart disease and other fetal developmental malformation problems. Folic acid supplementation usually starts 3 months before pregnancy at 0.4~0.8mg per day, and multivitamins containing folic acid are recommended. Pregnant women with multiple miscarriages or neural tube malformations need to take 4mg of folic acid supplement per day.There are many varieties of multivitamins containing folic acid, such as Elavil, Matna, Fosfo, etc., and you can choose any one of them and take it up to the 4th month of pregnancy.