About this test:
Perhaps the main reasons to know what blood group you are if you need to have a blood transfusion or if you are pregnant. Accidents and other emergencies can often be dealt with more efficiently knowing the blood group of the person or persons involved.
Red blood cells have various proteins on their surface called antigens. Also, blood plasma contains antibodies which will attack certain antigens if they are present. There are various types of red blood cell antigens – the ABO and rhesus types are the most important.
Combining the above types will give you your blood group. Your blood group depends on which antigens occur on the surface of your red blood cells. Your genetic make-up which you inherit from your parents determines which antigens occur on your red blood cells