Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Rh Incompatibility ?
    ### Response:
    Rh incompatibility is a condition that occurs during pregnancy if a woman has Rh-negative blood and her baby has Rh-positive blood.
                
"Rh-negative" and "Rh-positive" refer to whether your blood has Rh factor. Rh factor is a protein on red blood cells.
    