There are different blood types: A, B, AB, and O, with each also being Rh-positive or Rh-negative. Knowing your blood type is important for safe blood transfusions and organ transplants. Type ...

Which blood type test kit is best? There are a number of reasons why you might want to know what your blood type is. Some top reasons for this include matching with blood donors and discovering ...

A Word of Caution: This calculator should NOT be used for Paternity testing. Sometimes blood grouping inheritance can be flawed due to mutations and give false conclusions and for these reasons we ...

The Rh factor is a type of protein that's usually found on red blood cells. When you have this protein, you’re considered Rh positive. About 85% of people are Rh-positive. The rest are Rh-negative.