If you don't know your blood type, you're not alone. However it is important medical information to know, and here's how you can find it.

The O blood group lacks any antigens while ... Specifically, this type of blood lacks any of the 61 Rh antigens. Its ...

Additionally, there is a protein called "the Rh factor," which can also be present ... According to the American Red Cross, the most common blood type is O positive, which is the blood type ...

Many people are familiar with the ABO blood typing system, which lumps blood into the groups A, B, AB and O ... attack type A antigens, for example. Another important antigen is the Rh factor ...

While emergency rooms often use type O negative blood – the universal ... special significance during pregnancy. Women with Rh-negative blood require extra monitoring when carrying babies ...