Anemia is mainly related to iron deficiency, but the fact is that hematopoiesis requires not only iron ions but also other elements such as zinc, calcium and folic acid. Therefore, for pregnant women, it is recommended to take a daily multivitamin supplement throughout pregnancy, except for the first 3 months of pregnancy. Multivitamins already contain folic acid, so pregnant women do not need to take folic acid supplements specifically to prevent excessive amounts of folic acid supplementation. Doctors mainly recommend that pregnant women take multivitamins during pregnancy to help supplement iron, calcium, folic acid and other trace elements. If iron deficiency still occurs after supplementation, the doctor will provide iron supplementation or dietary guidance according to iron deficiency anemia.