Is there a genetic test for hemolytic disease of the newborn?

Yes: Hemolytic disease of the newborn, causing yellow skin and eyes (jaundice) with anemia, is most commonly due to a "set-up"--a blood type difference between mother and child. Blood types are caused by genes at the ABO and other loci (rhesus being most damaging), with o type or rh negative moms making antibodies to red blood cells of a or b or rh+ fetuses (if mom is o and fetus ab, baby switched), .

Testing for HDN: there is cord blood testing for this. It usually occurs with father with RH + and mother with RH negative testing.