Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Globozoospermia ?
    ### Response:
    Globozoospermia is a rare form of male infertility. Men affected by this condition have abnormal sperm with a round (rather than oval) head and no acrosome (a cap-like covering which contains enzymes that break down the outer membrane of an egg cell). As a result of these abnormalities, the sperm are unable to fertilize an egg cell, leading to male factor infertility.
    