Rhesus disease occurs in about one in a hundred cases of pregnant women with Rhesus negative blood having babies with Rhesus positive blood. In the worst instances of the disease, the mother's ...

For example: There are also Rhesus (Rh) antigens, which determine if blood is "positive" or "negative." If you have Rh proteins on the surface of your red blood cells, you are Rh positive.