You may or may not have this factor in your blood. When present, it is found on the surface of red blood cells and you are considered to have Rh-positive (Rh+) blood type. If you have no Rh ...

If Neanderthal women mated with Homo sapiens or Denisovan men, there was a high risk of newborns having neonatal hemolytic ...

Specifically, this type of blood lacks any of the 61 Rh antigens. Its distinctive factor is indeterminable, thereby earning ...

The antigens on a person's red blood cells are recognized as safe by the immune system, but someone with type B blood will have antibodies that attack type A antigens, for example. Another important ...

but someone with type B blood will have antibodies that attack type A antigens, for example. Another important antigen is the Rh factor, which gives the "positive" and "negative" signs to blood types.