The hematocrit (Ht or HCT) or packed cell volume (PCV) or erythrocyte volume fraction (EVF) is the proportion of blood volume that's occupied by red blood cells. It is normally about 48% for men and 38% for women. It is considered an integral part of a person's complete blood count results, along with hemoglobin concentration, white blood cell count, and platelet count. In mammals, hematocrit is independent of body size. The term "hematocrit" (British English: haematocrit) was coined in 1903.… (More on Hematocrit)