Question

question 3
the rh factor can result in a risk to a child if

the fetus’s blood is rh negative and the mother’s is rh positive.

the fetus’s blood is rh positive and the mother’s is rh negative.

the father’s rh factor and the mother’s rh factor are both negative.

the father’s rh factor and the mother’s rh factor are both positive.

Explanation:

The Rh factor risk occurs when an Rh - negative mother is exposed to Rh - positive fetal blood (e.g., during pregnancy or childbirth). If the fetus is Rh - positive and the mother is Rh - negative, the mother's immune system may produce antibodies against the Rh factor, which can pose a risk to subsequent Rh - positive fetuses.

• Option 1: If the fetus is Rh - negative and the mother is Rh - positive, there is no risk as the mother's blood won't react to the fetus's blood.
• Option 3: If both parents are Rh - negative, the fetus will also be Rh - negative, so no risk.
• Option 4: If both parents are Rh - positive, the fetus is likely Rh - positive, and since the mother is Rh - positive, there is no risk of Rh incompatibility.

Answer:

B. the fetus’s blood is Rh positive and the mother’s is Rh negative.