Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Klinefelter syndrome ?
    ### Response:
    What are the signs and symptoms of Klinefelter syndrome? The signs and symptoms of Klinefelter syndrome (KS) vary among affected people. Some men with KS have no symptoms of the condition or are only mildy affected. In these cases, they may not even know that they are affected by KS.
    