Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Afibrinogenemia ?
    ### Response:
    Afibrinogenemia, sometimes called congenital afibrinogenemia, is an inherited blood disorder in which the blood does not clot normally. It occurs when there is a lack (deficiency) of a protein called fibrinogen (or factor I), which is needed for the blood to clot.
    