Multiple choice

Erythroblastosis foetal occurs _____.

  1. when the mother is Rh positive and the child is Rh negative

  2. when the father and child are both Rh negative, but the mother is Rh positive

  3. when the mother and child are both Rh positive, but the father is Rh negative

  4. when the mother is Rh negative and the child is Rh positive

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Erythroblastosis foetalis occurs when an Rh-negative mother is sensitized to Rh-positive fetal red blood cells, usually during delivery, and subsequently produces anti-Rh antibodies. These IgG antibodies can cross the placenta in a subsequent Rh-positive pregnancy and destroy fetal RBCs.