Test Preparation For Optimal Results:
Fasting is not required.
ABO Grouping is the classification system used to determine blood types. This system is used because antibodies needed for testing are consistent and naturally present in the serum of those blood types. The potential blood types are: O positive, O negative, A positive, A negative, B positive, B negative, AB positive and AB negative. The universal donor is O negative. The universal recipient is AB positive.