Which of the following is a consequence of ABO incompatibility between a mother and her fetus?

A Hemolytic disease of the newborn due to maternal IgM antibodies ✓
B Increased risk of maternal thrombocytopenia
C Fetal anemia due to decreased erythropoiesis
D None of the above, as ABO incompatibility does not affect fetal outcomes

Explanation

ABO incompatibility between a mother and her fetus can lead to hemolytic disease of the newborn, primarily due to maternal IgM antibodies against the fetal red blood cells.

Source

_Williams Hematology, 9th edition_
Hematology Hematology: Blood Grouping and Crossmatching Hematology: Blood Grouping and Crossmatching Medium MEDICAL Confidence: high