Question

After examining the blood groups of husband and wife, the doctor advised them not to have more than one child, the blood group of the couple are likely to be

• A. male R$h^{-}$ and female R$h^{+}$
• B. female R$h^{-}$ and male R$h^{+}$
• C. male and female R$h^{+}$
• D. male and female R$h^{-}$

Answer 1

The correct option is B female R$h^{-}$ and male R$h^{+}$

Rh disease occurs during pregnancy. It happens when the Rh factors in the mom’s and baby’s blood don’t match.
There can be a problem when an Rh negative mother has a baby with an Rh positive father. If the baby's Rh factor is positive, like his or her father's, this can be an issue if the baby's red blood cells cross to the Rh negative mother. When this happens, the mom becomes sensitized to Rh positive blood.

Rh sensitization normally isn’t a problem with a first pregnancy. Most issues occur in future pregnancies with another Rh positive baby. During that pregnancy, the antibodies cross the placenta to fight the Rh positive cells in the baby's body. The baby could have jaundice, heart failure, and enlarged organs.