Ferritin values between 35 and 55 micrograms per liter are normal for pregnant women; the high demand for ferritin during pregnancy requires prevention of anemia. Ferritin demand increases during pregnancy due to the needs of maternal and fetal growth and development, and once iron deficiency occurs, it will manifest itself as a drop in ferritin inducing iron deficiency anemia. Iron deficiency anemia, in the clinic generally need to supplement iron to carry on the treatment, during pregnancy can choose ferrous sulfate, dextrose iron and other drugs, should consult a physician to guide the use. At the same time to supplement vitamin C to promote the absorption of iron supplements, taking iron supplements, pay attention to avoid drinking milk and strong tea. When iron deficiency anemia occurs, it is recommended that patients need to consult the hematology department of regular hospitals, consult the physician’s guidance, and not self-medication.