Neutrophils are the major type of leucocytes on differential counts.This is likely due to impaired neutrophilic apoptosis in pregnancy.The neutrophil cytoplasm shows toxic granulation. Neutrophil chemotaxis and phagocytic activity are depressed, especially due to inhibitory factors present in the serum of a pregnant female.There is also evidence of increased oxidative metabolism in neutrophils during pregnancy. Immature forms as myelocytes and metamyelocytes may be found in the peripheral blood film of healthy women during pregnancy and do not have any pathological significance.They simply indicate adequate bone marrow response to an increased drive for erythropoesis occurring during pregnancy.