Blood Group (ABO & Rh) Test

The Blood Group and Rh Factor test determines an individual's blood type and Rh factor. Blood type is determined based on the presence of specific substances, called antigens, on the surface of red blood cells. The four main blood groups/types are A, B, AB, and O. Blood type is determined by the presence of A and B antigens on red blood cells. Blood type is inherited from one's biological parents. Blood type is also categorised as positive (+) or negative (-) based on the presence of the Rh factor, a protein located on the surface of red blood cells. Individuals who possess this protein are classified as Rh-positive, while those who lack it are classified as Rh-negative. Approximately 85% of people are Rh-positive, making it the most common Rh status. The genes responsible for determining blood type and Rh factor are inherited from both parents. As a result, an individual’s blood type may sometimes differ from that of their parents. The Blood group test requires only a blood sample. There is no need for fasting or any special preparation. This test is crucial for ensuring compatibility in blood transfusions, organ donations, and managing pregnancy care.

A Blood group test is essential for safety during procedures such as a blood transfusion or organ transplant and during pregnancy for the following reasons: Safe Blood Transfusions: Before receiving a blood transfusion, it's vital to check the compatibility of your blood type and Rh factor with the donor’s blood. If the blood types or Rh factors are not compatible, your body can reject the transfused blood and produce antibodies against the donated red blood cells, leading to serious complications such as haemolysis, shock, kidney failure and potentially death. Organ and Tissue Donations: When donating or receiving organs, tissues, or bone marrow, knowing your blood type and Rh factor helps match donors and recipients to avoid dangerous reactions later. Pregnancy: Blood typing and Rh factor testing are particularly important during pregnancy. If an Rh-negative mother is carrying an Rh-positive baby, her immune system might attack the baby’s red blood cells, leading to a condition known as haemolytic disease of the newborn (HDN). HDN can cause jaundice (yellowing of the skin), anaemia (low red blood cells), and other serious complications. By determining the risk of Rh incompatibility, doctors can take steps to protect both the mother and baby. Overall, this test helps ensure the safety of blood transfusions, organ transplants, and pregnancies by identifying potential risks and allowing for timely medical interventions.

Understanding your report

What your results can mean — always review them with your doctor:

The blood group and Rh factor test results are interpreted as follows: ABO Blood Type: Your results will reveal your ABO blood type. If you have: Type A: You can receive blood from Type A or Type O donors. Type B: You can receive blood from Type B or Type O donors. Type AB: You can receive blood from any ABO blood type (A, B, AB, or O). Type AB individuals are universal recipients. Type O: You can only receive Type O blood. However, a person with Type O blood is considered to be a universal donor and can donate blood to other blood groups. Rh Factor : The results will indicate whether you are Rh-positive (Rh+) or Rh-negative (Rh-): Rh-positive (Rh+): You can receive Rh+ or Rh- blood. Rh-negative (Rh-): You can only receive Rh- blood. During pregnancy, if an Rh-negative mother carries an Rh-positive baby, there is a risk of Rh incompatibility. This condition can be managed with an injection of Rh immunoglobulin (RhIg) to prevent complications in future pregnancies. In addition to ABO and Rh types, there are other blood types as well that may affect compatibility. Cross-matching and Coombs tests are performed to ensure safe transfusions and organ donations.