Eating folic acid in advance during preparation for pregnancy has the following benefits: 1, folic acid is helpful for the development of the baby’s nervous system, eat folic acid in advance to help the development of the fetal nervous system, for the prevention of neural tube malformations have a role. 2, folic acid for the formation of hemoglobin has a role to play, so in preparation for the period of eating folic acid first can promote the formation of hemoglobin, for the prevention of anemia during pregnancy has a certain role. 3, eat properly. Folic acid can enhance resistance, which is helpful for strengthening the body and improving the quality of eggs, which is good for pregnancy. It is recommended that women preparing for pregnancy eat about three months of folic acid during the preparation period, to determine the need to continue to eat after pregnancy, generally early pregnancy in the first trimester of folic acid should be adhered to eat folic acid, folic acid in pregnancy but also to carry out measurements, to see whether it is necessary to continue to supplement.