A primiparous D-negative (Rh-negative) mother has just delivered a D-positive child. Administration of which of the following substances would be indicated: (A) Anti-D IgG to child, (B) Anti-D IgG to mother, (C) D-positive red cells to child, (D) D-positive red cells to mother
Answer is B. - Administration of anti-D antiserum to D-negative mother within 72hrs of delivery of D-positive child prevents maternal alloimmunization by removing fetal red cells from the maternal circulation.