At 22 weeks of gestation continues increasing the blood volume in a woman’s body. The amount of plasma (the liquid part of blood) and red blood cells with leukocytes increases unevenly. During this period, a pregnant woman has the most “liquid” blood with a minimum of red blood cells.

The lack of erythrocytes in the blood and, accordingly, hemoglobin, often results in physiologic anemia in pregnant women. This condition is dangerous because the baby may have intrauterine growth retardation, the baby may be born with immature organs and life systems. To prevent this, a pregnant woman should eat healthy food, take vitamin complexes containing iron and iron supplements if they are recommended by a doctor.