Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) congenital afibrinogenemia ?
    ### Response:
    Congenital afibrinogenemia is a bleeding disorder caused by impairment of the blood clotting process. Normally, blood clots protect the body after an injury by sealing off damaged blood vessels and preventing further blood loss. However, bleeding is uncontrolled in people with congenital afibrinogenemia.
    