What are the tests for Rh isoimmunization?

Blood type & screen. The basic test is a blood type and screen in which your blood type is determined and any antibodies to blood cell antigens your body may have produces are detected. If your blood type is rh positive, then you should not worry about rh isoimmunization. A type and screen is a normal part of prenatal care, so if you are pregnant, please see your obstetrician.