Nowadays, most pregnant women choose folic acid. There are many kinds of folic acid, such as Silien, Kingsleyan and Elavil, which contains multivitamins, and Rumex, which contains multivitamins and linolenic acid, as long as the folic acid tablets produced by regular manufacturers are more reliable. During pregnancy preparation, both partners should take folic acid tablets. Folic acid supplementation can prevent malformation of fetal neural tube development and prevent anemia. Folic acid supplementation should be started 3 months before pregnancy and taken until the early 3 months of pregnancy, or throughout pregnancy if available. In addition to folic acid supplementation during pregnancy preparation, you should also quit smoking and drinking, avoid exposure to radioactive and toxic substances, do not use drugs indiscriminately at home, pay attention to physical exercise, and usually pay attention to maintaining a balanced nutrition and eating more fresh fruits and vegetables.