Background: The 12th week of pregnancy is the period when pregnant women are most likely to have nutritional imbalances, because during this period the fetal organs have basically formed and require a large amount of nutrients to support their normal growth and development. Folic acid is an essential vitamin that pregnant women need before and during pregnancy to prevent birth defects such as neural tube defects and cleft lip. However, when a pregnant woman is 12 weeks pregnant, does she need to continue taking folic acid? This is discussed below from several aspects