Women in early pregnancy should take folic acid tablets, which can prevent abnormal development of the fetal nervous system. Folic acid is an important coenzyme in the process of cellular DNA synthesis, if the body lacks folic acid in early pregnancy, it may affect the development of the fetal nervous system, and in severe cases, it may lead to stillbirth, and folic acid tablets can prevent the occurrence of congenital neural tube malformations of the fetus, so clinically it is generally recommended that women of childbearing age from the planning of pregnancy until the pregnancy within the next three months to take folic acid tablets on a regular basis. Contraindications to the use of folic acid tablets include hypersensitivity to the product. Adverse reactions are rare during treatment, but gastrointestinal symptoms such as loss of appetite, nausea, and abdominal distension may occur if the drug is used for a long period of time. Folic acid is required in early pregnancy, but the dosage and duration should be taken under the supervision of a specialist.