Infertility, MaleOligospermiaAzoospermiaPubertyInfertilitySperm CountInfertility, FemaleSpermatogenesisPuberty, PrecociousSperm MotilityChromosomes, Human, YPuberty, DelayedTestisSpermatozoaMesteroloneHydrocarbons, BrominatedAsthenozoospermiaVaricoceleSexual MaturationSemen AnalysisSemenTestosteroneFertilityReproductive Techniques, AssistedSeminal Plasma ProteinsPregnancySertoli Cell-Only SyndromeY ChromosomeFertilization in VitroSperm Injections, IntracytoplasmicAndrologySex Chromosome Disorders of Sex DevelopmentOrchitisSex Chromosome AberrationsAbnormal KaryotypeSertoli CellsEpididymisSperm RetrievalSpermatidsVasovasostomyProtaminesReproductive TechniquesFallopian Tube DiseasesSperm TailSeminiferous TubulesHypogonadismFollicle Stimulating HormonePregnancy RateLuteinizing HormoneChromosome DeletionKlinefelter SyndromeTesticular DiseasesReproductive MedicineCryptorchidismEjaculationSperm-Ovum InteractionsFertilizationSperm MaturationAcrosomeInsemination, ArtificialKartagener SyndromeReproductionFertility Agents, MaleGenital Diseases, MaleGonadotropin-Releasing HormoneSequence Tagged SitesEndometriosisCiliary Motility DisordersHysterosalpingographySpermatogoniaAcrosome ReactionScrotumAxonemal DyneinsSperm HeadSpermatocytesPregnancy OutcomeGenitalia, MaleCase-Control StudiesEpididymitisOvaryEjaculatory DuctsVas DeferensKisspeptinsEmbryo TransferMutationMeiosisGene DeletionClomipheneTesticular NeoplasmsZona PellucidaMicrosurgeryUrologic Surgical Procedures, MaleGerm CellsAge Determination by SkeletonInseminationSperm CapacitationAnovulationOvulationGonadotropinsMice, Knockout