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This article waslast modified on 10 July 2017.
Removal of a person's blood in small amounts and its replacement with equal amounts of donor blood, especially exchange transfusion of the foetus (intrauterine exchange transfusion) or the newborn to treat erythroblastosis foetalis (or neonatorum) by removing the Rh and ABO antibodies and damaged red blood cells (erythrocytes) and substituting blood with normal oxygen-carrying capacity.