Low risk of folic acid metabolism means that the amount of folic acid in the pregnant woman’s body can meet the baby’s needs without adversely affecting the fetus. The role of folic acid during pregnancy is to promote the development of the fetus’s nervous system and to prevent malformations in the baby. If a woman lacks folic acid in her body, she needs to take folic acid supplements from the third trimester before pregnancy to the third trimester after pregnancy. When a pregnant woman is examined for low risk of folic acid metabolism, it means that the level of folic acid in the body of the pregnant woman is at a normal level, which can satisfy the needs of the fetus, and at this time there is no need to worry too much. Pregnant women need regular medical checkups during pregnancy, and even if the folic acid level is normal, it is still necessary to actively rule out fetal malformations, such as Down’s syndrome screening and four-dimensional ultrasound to rule out the possibility of fetal anomalies.