With the development of society, more and more women have a certain knowledge of preparation for pregnancy, before pregnancy will be appropriate to supplement some folic acid. For prospective mothers, folic acid supplementation is even a very important thing. If a pregnant woman lacks folic acid, it may lead to fetal neural tube malformations, eye, lip and palate, cardiovascular, gastrointestinal and other organ malformations, and may also increase the risk of pre-eclampsia and placental abruption in pregnant women. So, how should we supplement folic acid scientifically? 1, when to start supplementing folic acid? You can start taking folic acid from 3 months before pregnancy preparation to the first 3 months of pregnancy, or even throughout the whole pregnancy. 2.How to supplement folic acid? (1) Eat foods rich in folic acid: fresh dark green leafy vegetables, beans, grains, etc.; fresh fruits such as oranges, strawberries, cherries, bananas, kiwifruit, etc. Other foods such as animal liver, poultry and eggs are also rich in folic acid. (2) Drug supplementation: Before pregnancy, you can take a single folic acid preparation, and after pregnancy, you can take multivitamins (which contain folic acid), such as Elavil, Fosfol, and Matna. There are two types of single folic acid tablets on the market, one containing only 0.4 mg (400 mcg) of folic acid in each tablet, and the other containing 5 mg of folic acid in each tablet. Expectant mothers need to choose the former one, so don’t choose the wrong one. The average mom-to-be can take 0.4 mg per day in preparation for and during early pregnancy. However, for folic acid deficient moms-to-be need to add folic acid to the dosage, which needs to be taken according to the doctor’s instructions. Folic acid deficiency can be determined by testing the MTHFR gene. The Chinese Nutrition Society in the “Chinese residents dietary nutrient reference intake” (2013 version) for pregnant women daily folic acid recommended intake of 0.6 mg, the highest not more than 1 mg. 3. I did not take folic acid in advance 3 months before pregnancy, do I need to increase the amount of folic acid after an unplanned pregnancy? If once pregnancy is detected, folic acid should be supplemented immediately, but there is no need to increase the dose. 4.Does taking folic acid during pregnancy preparation affect menstruation? No. Folic acid does not affect ovarian ovulation and the endocrine axis in the body. 5.Will there be no fetal abnormality after taking folic acid? Do I still need to do prenatal checkups? Of course not, folic acid supplementation can only prevent some of the fetal malformations, fetal malformations are related to many factors, in order to give birth to a healthy and smart baby, mothers-to-be do not be lazy, please go to the hospital for prenatal checkups on time.