Contraceptive Agents, MaleTestosteroneTestosterone CongenersSpermatogenesis-Blocking AgentsHypogonadismInjections, IntramuscularAndrogensNandroloneAdministration, OralTestosterone PropionateOrchiectomyDihydrotestosteroneTestisSex Hormone-Binding GlobulinLuteinizing HormoneEstradiolGonadal Steroid HormonesEpitestosteroneCastrationAndrostenedioneFollicle Stimulating HormoneFlutamideReceptors, AndrogenSexual MaturationDehydroepiandrosterone3-Oxo-5-alpha-Steroid 4-DehydrogenaseGonadotropin-Releasing HormoneHormone Replacement TherapyOrgan Size