After the third month of pregnancy, the fetus’s nervous system is almost complete and there is no need to take folic acid. If the pregnant woman herself has anemia caused by folic acid deficiency, she can continue to take it. Folic acid is designed to prevent fetal neural tube malformations. At around the third trimester of pregnancy, the development of the fetal neural tube is basically mature, and it is sufficient to take it until around the second trimester of pregnancy. Folic acid has the role of promoting the synthesis of red blood cells, hemoglobin, such as pregnant women lack of folic acid or folic acid metabolism disorders, pregnant women themselves will occur anemia, in this case, more than three months, or need to continue to take folic acid tablets. Do you still need to take folic acid after the third trimester of pregnancy, you need to use the medication under the guidance of a doctor, not blindly self-medication, so as to avoid adverse effects.