IRON DEFICIENCY ANEMIA Iron deficiency anemia is due to insufficient iron.In Iron deficiency anemia hemoglobin synthesis is impaired, resulting in anemia and reduced o2 delivery to tissue. CAUSES OF IRON DEFICIENCY Rapid growth in infancy or adolescence Pregnancy Gastrointestinal bleeding can result from regular use of some over-the-counter pain relievers, especially aspirin. Erythropoietin therapy Chronic