ABO hemolytic disease of the newborn
When the red blood cells of the mother lacks A (or B) antigens that are present in the red blood cells of the fetus, the mother produces IgG antibodies that pass through the placenta and reach the fetal circulation where they can attack fetal red blood cells. This causes hemolysis in the fetus, which may lead to anemia.
See also: erythroblastosis fetalis
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I'll change it back then. lol. Who coined the term "Erythroblastosis ... 1946, erythroblastosis fetalis, or hemolytic disease of the newborn, affected between 0.5% and 1.0% of fetuses ...
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