Blood Type Test

blood type Blood type tests are done before a person gets a blood transfusion and to check a pregnant woman's blood type Human blood is typed by certain markers

The Different Blood Types · Group A has the A · Group B has the B antigen and the A antibody · Group AB has A and B antigens but neither A nor blood group Individuals with type A blood—without any prior exposure to incompatible blood—have preformed antibodies to the B antigen circulating in their blood plasma