The fetus is not rejected because
A)it is too small.
B)it is in an immunologically privileged site.
C)the father is immunosuppressed.
D)it has no antigens.
E)it is in an immunologically privileged site AND the father is immunosuppressed.

Question

Quizplus · Accepted Answer

The fetus is not rejected because it is in an immunologically privileged site, which means it is protected from the mother's immune system. The placenta also acts as a barrier between the mother and fetus. It is not because it is too small or has no antigens. While some evidence suggests that the father's immune system may play a role in this process, immunosuppression is not a factor. Option E is incorrect because the immunologically privileged site is the primary reason for the fetus not being rejected.

The Fetus Is Not Rejected Because