- A condition characterized by the abnormal presence of erythroblasts in the circulation of the fetus or newborns. It is a disorder due to blood group incompatibility, such as the maternal alloimmunization by fetal antigen rh factors leading to hemolysis of erythrocytes, hemolytic anemia (anemia, hemolytic), general edema (hydrops fetalis), and severe jaundice in newborn.
- A disorder caused when there is a rh-factor blood-type incompatibility between the mother and fetus, and the mother's immune system forms antibodies that attack the red blood cells of her unborn child. This disorder can only occur if the mother is rh-negative and the fetus is rh-positive.
- Hemolytic anemia of the fetus or newborn caused by transplacental transmission of maternally formed antibody, usually secondary to an incompatibility between the blood groups of mother and offspring.