Sperm CountSpermatogenesisInfertility, MaleInfertilityTestisInfertility, FemaleSpermatozoaSeminiferous TubulesSertoli CellsFertilitySemenEpididymisSperm MotilitySperm HeadOligospermiaSperm MaturationOrgan SizeSeminiferous EpitheliumTestosteroneSperm CapacitationScrotumSemen AnalysisAsthenozoospermiaEjaculationTesticular DiseasesSexual Behavior, AnimalFollicle Stimulating HormoneSpermatogoniaSexual MaturationReproductive Physiological PhenomenaReproductionProphaseSpermatidsSertoli Cell-Only SyndromeSperm Injections, IntracytoplasmicInsemination, ArtificialLeydig CellsReproductive Techniques, AssistedPregnancyLuteinizing HormoneSperm-Ovum InteractionsCell CountSeminal VesiclesGenitalia, MaleFertilizationSperm TransportMeiosisAzoospermiaPoeciliaAcrosomePropylthiouracilFallopian Tube DiseasesEstrogens, Non-SteroidalGerm CellsGonadotropins, PituitarySperm BanksSpermatocytesInhibinsBody WeightSperm MidpieceSemen PreservationPregnancy RateFertilization in VitroReproductive TechniquesZona PellucidaOrchiectomyAgingEndometriosisHysterosalpingographyVaricoceleBreedingHorsesCryopreservationSwineSeminal Plasma ProteinsCattleAnimals, NewbornClomipheneChromosomes, Human, YFallopian TubesSeasonsOvulation InductionBiological EvolutionAnovulationTime FactorsOocytesSelection, GeneticReproductive MedicineRats, Sprague-DawleyPregnancy OutcomeProtaminesSpecies SpecificityInsemination, Artificial, HomologousFertility Agents, FemaleSperm WhaleY ChromosomeOvumEmbryo ImplantationInseminationSex Chromosome Aberrations