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A contraceptive method tested for males is a weekly injection of testosterone. When testosterone is injected into a male's blood stream, it inhibits the release of two pituitary hormones that stimulate sperm and testosterone production. The pituitary hormone that stimulates the production of sperm and the pituitary hormone that stimulates the production of testosterone are, respectively. OLH and FSH OFSH and LH O testosterone and LH O testosterone and FSH 1 point
Some men have a defect of the Y chromosome called AZFC deletion, which 1 point results in low sperm production. The male structure that is affected by the AZFC deletion is the O epididymus Ovas deferens Oseminal vesicle Oseminiferous tubules