Erythropoiesis in pregnancy

Area of Science:

• Obstetrics and Gynecology
• Hematology
• Nutritional Science

Background:

• Healthy pregnancy involves significant blood volume expansion, with plasma volume increasing by 50% and red cell mass by 18-25%.
• This physiological change leads to a decrease in hemoglobin concentration, typically maximal at 32 weeks gestation, which should not fall below 11 g/dL.
• Deficiencies in essential hematinics, particularly iron, are common due to increased maternal requirements and inadequate dietary intake.

Purpose of the Study:

• To highlight the critical role of iron and folate during pregnancy.
• To underscore the adverse effects of hematinic deficiencies on maternal, fetal, and neonatal outcomes.
• To emphasize the impact of iron deficiency on neurodevelopment in offspring.

Main Methods:

• Review of physiological changes during pregnancy related to blood volume and hemoglobin.
• Analysis of the causes and consequences of iron deficiency anemia in pregnancy.
• Examination of the effects of maternal iron deficiency on offspring neurodevelopment.

Main Results:

• Iron deficiency accounts for over 90% of pathological anemia in pregnancy, linked to depleted stores and poor intake.
• Tissue enzyme function can be impaired even in early iron deficiency, preceding significant anemia.
• Maternal iron deficiency is associated with increased risks of preterm birth, excessive blood loss at delivery, and depleted iron stores in newborns.

Conclusions:

• Iron deficiency in pregnancy has profound effects on maternal health, fetal development, and neonatal outcomes, including neurodevelopmental deficits.
• Folate deficiency often coexists with iron deficiency due to poor diet, though its hematological effects can be masked.
• Early detection and management of iron deficiency are crucial for improving both maternal and infant health, with demonstrated benefits for neurodevelopmental outcomes.