Answer:
Erythroblastosis fetalis
Explanation:
Erythroblastosis fetalis, occurs when there is an antigenic incompatibility between a mother and her fetus. When an antigen present in the fetus and absent in the mother crosses the placenta into the maternal circulation, maternal antibodies are produced, causing her body to sense the fetus as a foreign body to be combated. The antibodies return to the fetal circulation and result in red blood cell destruction.
This incompatibility could be in varying forms including:
