You can take folic acid in moderation when you are pregnant. Folic acid is a water-soluble vitamin that is an essential factor in protein and nucleic acid synthesis. Folic acid is indispensable for the rapid growth of white blood cells, red blood cells, hemoglobin, DNA metabolism, amino acid metabolism and long chain fatty acids in the brain. Proper supplementation of folic acid in the first three trimesters of pregnancy can prevent the occurrence of miscarriage, preterm labor, fetal neural tube malformation and other conditions. It can also meet the growth needs of the fetus and the nutritional needs of the pregnant woman to prevent anemia and other conditions. Oral folic acid during pregnancy can also reduce the probability of gestational hypertension and gestational diabetes, and effectively prevent the occurrence of various pregnancy complications. Pregnant women need to supplement calcium, iron and zinc in addition to folic acid. Usually eat more high-quality protein and vitamin-rich foods to ensure the normal development of the fetus and their own health.