The classification of blood types involves two systems: the ABO system and the Rh system. Blood type classification uses the ...

all of whom were typed for ABO and Rh. In 1 group each of the families had an affected grandchild, the diagnosis of erythroblastosis being based upon clinical evidence as well as a positive direct ...

Currently, blood is primarily categorized according to its ABO group and the presence or absence of the Rh factor. The blood type a child has is determined by genetics. Doctors mix a patient's ...