Multiple Choice Questions And Answers In Immunohematology Instant

Disclaimer: These questions are for educational purposes only and reflect standard teaching practices in the United States. Refer to your local AABB, FDA, or equivalent guidelines for current clinical practice.

Explanation: RhIg (anti-D) coats fetal D-positive RBCs that have crossed into the maternal circulation, preventing the mother’s immune system from recognizing the D antigen and mounting a primary immune response.

(Correction for clarity: In standard textbooks, uncrossmatched O-positive blood given to an O-positive male carries a small risk of minor antigen incompatibility (Kell, Kidd, Duffy). The answer is if Kidd antibodies are present in donor plasma.)