RH incompatibility occurs when the mother is Rh negative and the baby is Rh positive.

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Multiple Choice

RH incompatibility occurs when the mother is Rh negative and the baby is Rh positive.

Explanation:
Rh incompatibility occurs when the mother is Rh negative and the baby is Rh positive. The Rh factor is a protein on red blood cells; if fetal Rh-positive cells enter the mother's bloodstream, her immune system can make anti-D antibodies. In a future pregnancy with another Rh-positive fetus, these antibodies can cross the placenta and attack the baby’s Rh-positive red blood cells, causing hemolytic disease that can lead to anemia and other complications. Preventive treatment with Rh immunoglobulin during and after pregnancy helps stop the mother from becoming sensitized. The other options describe different pregnancy conditions that are not caused by Rh blood type incompatibility.

Rh incompatibility occurs when the mother is Rh negative and the baby is Rh positive. The Rh factor is a protein on red blood cells; if fetal Rh-positive cells enter the mother's bloodstream, her immune system can make anti-D antibodies. In a future pregnancy with another Rh-positive fetus, these antibodies can cross the placenta and attack the baby’s Rh-positive red blood cells, causing hemolytic disease that can lead to anemia and other complications. Preventive treatment with Rh immunoglobulin during and after pregnancy helps stop the mother from becoming sensitized. The other options describe different pregnancy conditions that are not caused by Rh blood type incompatibility.

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