Taking folic acid during pregnancy can prevent neural tube malformations and prevent nutritional anemia in pregnant women. Pregnant women in the first trimester of pregnancy, usually can be appropriate to follow the doctor’s advice to take folic acid, its main purpose is to prevent fetal neural tube malformation, so in order to prevent birth defects, China has implemented a free nucleic acid supplementation, in the preparation for pregnancy and the first trimester of pregnancy, you need to supplement folic acid. Folic acid as a water-soluble vitamin, take some folic acid during pregnancy, can prevent pregnant women from developing megaloblastic anemia, because megaloblastic anemia is due to the lack of folic acid and vitamin B12 caused by deoxyribonucleic acid synthesis disorders of anemia, which is more common in pregnant women and infants. Therefore, taking some folic acid during pregnancy is beneficial to the health of the pregnant woman and the fetus, but it should be taken in strict accordance with medical advice and according to the dosage.