The front cover sets out diagrammatically the Male Hormone Contraceptive Regimens, (androgens alone or in combination with progestins or GnRH antagonists and potential but untrialled agents in hatched boxes) acting to inhibit the hypothalamic pituitary axis, inhibit Sertoli cell androgen receptors act as FSH receptor antagonists or agents to inhibit spermatogenesis and spermiation. See pages 463–482.
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