An iron deficiency anemia affects 8.8% of the population world wide.It is slighltly more common among females than males.
Anaemia due to increased blood loss
Post haemorshagic anemia and chronic blood loss
B.Anaemia due to impaired red cell production:
Iron deficient anaemia-it is caused due to defect in haem synthesis
Thalaessaemia-it is caused dur to defect in globin synthesis.
Vitamin B12 deficiency(Pernicious anaemia) and megaloblastic aneamia
Congenital anaemia-sideroblastic anaemia(erythrocytes and normoblast which contains iron in their cytoplasm ,congenital dyserythropoietic anaemia.