Anemia in pregnant women is generally considered severe when the hemoglobin concentration is less than 60 g/L. Under normal circumstances, pregnant women will experience a physiological decrease in hemoglobin concentration due to the increase in blood volume. Our country stipulates that pregnant women are considered anemic only if their hemoglobin concentration is below 100g/L, and above 100g/L is not considered as anemia. The most common cause of anemia in pregnant women is iron deficiency anemia. Due to the rapid growth and development of the fetus during pregnancy, if you do not pay attention to increase iron-rich foods, it is easy to cause iron deficiency anemia. When a pregnant woman is severely anemic, she will experience a series of anemia symptoms such as dizziness and fatigue, panic and chest tightness. At the same time, anemia will also affect the growth and development of the fetus, and because anemia increases the burden on the cardiopulmonary function of pregnant women, so that in the delivery, there may be difficulties in labor, prolongation of the labor process and other unfavorable factors. Therefore, pregnant women with anemia should pay enough attention to identify the cause and treat it in time.