Most of the time, Rh incompatibility between mother (Rh-) and fetus (Rh+) does not cause fetal health problems with the woman's first pregnancy.

Question

Quizplus · Accepted Answer

During the first pregnancy, the mother's immune system is usually not sensitized to the Rh+ blood, so it typically does not affect the fetus. Problems may arise in subsequent pregnancies if the mother has developed antibodies.

Most of the Time, Rh Incompatibility Between Mother (Rh-) and Fetus