Contraceptive Agents, MaleTestosteroneTestosterone CongenersSpermatogenesis-Blocking AgentsHypogonadismInjections, IntramuscularAndrogensNandroloneInjectionsAdministration, OralTestosterone PropionateOrchiectomyLuteinizing HormoneDihydrotestosteroneTestisSex Hormone-Binding GlobulinEstradiolGonadal Steroid HormonesCastrationEpitestosteroneInjections, IntravenousFollicle Stimulating HormoneAndrostenedioneInjections, SubcutaneousInjections, IntralesionalInjections, Intra-ArticularFlutamideGonadotropin-Releasing HormoneOrgan SizeSexual MaturationReceptors, AndrogenInjections, IntraperitonealDrug ImplantsDehydroepiandrosteroneRats, Sprague-Dawley3-Oxo-5-alpha-Steroid 4-DehydrogenaseProgesteroneHormone Replacement TherapySpermatogenesis