A woman with blood group O ^ -ve is currently expecting her second child. Her first child was born with blood group A ^ +ve , and she did not receive any medical intervention (such as anti-Rh antibodies) after the delivery. Which of the following antibodies are most likely present in her blood plasma during this second pregnancy?

Step-by-step solution

Individuals with blood group O lack both A and B antigens on the surface of their red blood cells, so they naturally possess both anti-A and anti-B antibodies in their blood plasma. The woman is Rh ^ -ve and her first child was Rh ^ +ve . During the delivery of the first child, a small amount of fetal blood can enter the maternal circulation. Since she did not receive prophylactic anti-Rh antibodies immediately after delivery, her immune system recognized the Rh antigen as foreign and produced anti-Rh antibodies (a