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 ...

Add Yahoo as a preferred source to see more of our stories on Google. I really loved finding out my blood type when I donated blood (A-, if you're curious). The science around blood types is pretty ...

A person's blood type is determined by "the presence or absence of certain antigens – substances that can trigger an immune response if they are foreign to the body," according to American Red Cross.

Knowing your blood type is crucial medical information, but unless you've given blood before you might not be sure what yours is. I realized this when I was asked for mine while filling out paperwork ...