About The Test
What is Blood Grouping?
Blood group testing is done to determine a person’s blood group (A, B, AB, or O) and Rh type. The blood group of a person is predicted by the presence of a specific antigen marker on the surface of the red blood cells (RBCs). When antigen A is present, the person has A blood group, B antigen is present in the B blood group. Consequently, both antigens A and B are present in AB, and no antigen in the O blood group.
The test also determines the Rh (Rhesus) factor. People who have Rh antigen on their RBCs are Rh+ (positive), while those who do not are Rh- (negative). This test is necessary for safe blood transfusions and to determine the risk of Rh factor incompatibility during pregnancy.
Why is Blood Grouping done?
- To determine compatibility with donated blood before receiving a transfusion of blood or blood components
- At the time of donating blood, tissue, organ, or bone marrow or getting registered as a potential donor
- To determine the risk of Rh factor incompatibility between the mother and fetus before pregnancy or during pregnancy
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