Life ExpectancyCastrationOrchiectomyQuality of LifeTestosteroneAndrogensProstateDihydrotestosteroneSeminal VesiclesWorkAndrogen AntagonistsReceptors, AndrogenFlutamideAnxiety, CastrationClonixinCyproteroneLifeTestisAnimal WelfareGonadotropin-Releasing HormoneEpididymisTosyl CompoundsNeoplasms, Hormone-DependentButorphanolEstradiolOrgan SizeHaptoglobinsDrug ImplantsAnesthesia, LocalKetoprofenLuteinizing HormoneZeranolAndrogen Receptor AntagonistsGonadal Steroid HormonesTime FactorsXylazineOvariectomyHornsAnilidesHydrocortisoneSexual MaturationTestosterone PropionateLeuprolideTrematodaScrotumSex Characteristics5-alpha Reductase InhibitorsAzasteroidsRandom AllocationProstate-Specific AntigenRats, Inbred StrainsLidocaineHarderian GlandFinasterideAnesthesia, CaudalFollicle Stimulating HormoneLife Change EventsWork Schedule ToleranceCattleThiazinesSex FactorsLife Cycle StagesWork Capacity EvaluationRNA, MessengerAnimal HusbandryShrewsBehavior, AnimalQuestionnairesDiagnostic Techniques, RadioisotopeFeminizationRats, Sprague-DawleyAntineoplastic Agents, HormonalEatingGonadotropins, PituitaryPituitary Hormone-Releasing HormonesPenisAndrogen-Binding ProteinReturn to WorkHormonesCyproterone AcetateSwineBody WeightCopulationEstrogensAnalgesiaGenitalia, MalePituitary GlandBuserelinResorcinolsLife TablesNitrilesClusterinDiethylstilbestrolPenile ErectionPhenylthiohydantoinGoserelinAndrostane-3,17-diolLife Support CareRats, WistarAnesthetics, Combined