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| Rh-Hr Blood-Group System Rh Factors | Rhesus Blood-Group System | Antigen D, Rh Blood Group | Rh Sensitization | Blood-Group System, Rh-Hr | Blood-Group System, Rhesus | Blood-Group Systems, Rh-Hr | Blood-Group Systems, Rhesus | Factor, Rh | Factors, Rh | Rh Factor Erythrocyte isoantigens of the Rh (Rhesus) blood group system, the most complex of all human blood groups, because the genes differ by determining a different number of the over thirty antigens thus far described and do so with remarkably different quality. The major antigen Rh or D is the most common cause of erythroblastosis fetalis. |