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

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 ...

A person's blood type is determined by "the presence or absence ... Additionally, there is a protein called "the Rh factor," which can also be present (+) or absent (–). These factors help ...

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.

If you don't have Rh proteins on the surface of your red blood cells, you have negative blood. One of the easiest and most effective ways to determine your blood type is to have your doctor ...

It's a bit simplistic, but you can think of the Rh factor as a protein that is either present (positive) or absent (negative) on red blood cells ... ones in RhoGAM are a type that won't cross ...