Question

The disease erythroblastosis fetalis in human embryo is caused due to:

• A. Disadjustment of blood groups
• B. Disadjustment of Rh factor
• C. Both A and B
• D. None of the above

Answer 1

Answer: (B)

Disadjustment of Rh factor

Erythroblastosis fetalis is hemolytic anemia in the fetus caused by transplacental transmission of maternal antibodies to the fetal RBCs. The disorder usually results from incompatibility between the maternal and fetal blood groups, often Rh antigens. Erythroblastosis fetalis classically results from Rh incompatibility, which may develop when a woman with Rh-negative blood is impregnated by a man with Rh-positive blood and conceives a fetus with Rh-positive blood.
Thus, the correct answer is option (B), 'Disadjustment of Rh factor'.