Low hemoglobin during pregnancy how to do need to refer to the condition of the pregnant woman, the condition of different treatment methods vary, such as the use of drugs to supplement iron, folic acid, etc., if necessary, need blood transfusion. If the low hemoglobin of pregnant women is caused by iron deficiency anemia, if the hemoglobin is above 70g/L, the main oral medication, commonly used drugs include polysaccharide iron complex, ferrous sulfate, ferrous succinate, etc.; if the hemoglobin is lower than 70g/L, or if there is a need for delivery in the near future, blood transfusion should be carried out. If the low hemoglobin of pregnant women is caused by megaloblastic anemia, they should change their bad dietary habits, eat more vegetables and fruits, and supplement folic acid in time, which can be taken orally or injected intramuscularly, and in serious cases, they need blood transfusion. Therefore, low hemoglobin during pregnancy should be timely medical treatment, under the guidance of a professional physician, so as to avoid delays in the condition leading to adverse consequences.