A baby’s blood group was determined as 0 Rh negative. Select the blood group the baby’s mother or father will not have –
**Core Concept**
The ABO blood group system is determined by the presence or absence of specific antigens on the surface of red blood cells. The Rh blood group system is another important blood group system that can cause complications in pregnancy. The baby's blood group of 0 Rh negative indicates that the baby does not have the RhD antigen on their red blood cells.
**Why the Correct Answer is Right**
The mother or father who is not 0 Rh negative must be the one who is Rh positive, as they would have passed the RhD antigen to the baby. If the mother is Rh negative and the baby is Rh positive, her immune system may react to the RhD antigen on the baby's red blood cells, leading to the production of antibodies that could damage the baby's red blood cells in future pregnancies. This is known as Rh sensitization. The father's Rh blood group does not directly affect the baby's Rh blood group.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not provided.
**Option B:** This option is not provided.
**Option C:** This option is not provided.
**Option D:** This option is not provided.
**Clinical Pearl / High-Yield Fact**
It's essential to note that even if the mother is Rh negative and the father is Rh positive, the baby's Rh blood group is still determined by the mother's blood group. In this case, the baby will inherit the RhD antigen from the father, but the mother's immune system will not react to it unless she is exposed to the RhD antigen through another pregnancy or transfusion.
**Correct Answer:** D.