A blood disease of foetuses and newborn infants caused by the mother's anti-Rh+ antibodies agglutinating or bursting the red cells of her infant's Rh+ blood. Symptoms include life threatening anemia, jaundice, fever, swollen tissues from edema, and an enlarged liver and spleen. Serious cases are treated by blood replacement. Erythroblastosis fetalis is also referred to as "hemolytic anemia" and "hydrops fetalis. "