Blood Grouping (A B O) and Rh Type

Blood type and Rh tests help determine the ABO blood group and Rh factor. The possible ABO blood groups include A, B, AB, and O. The Rh antigen is another substance that may be present on the surface of red blood cells. The Rh test helps determine whether the Rh factor is positive or negative and is important for blood transfusions and pregnancy management.