Infertility, MaleOligospermiaAzoospermiaInfertilitySperm CountInfertility, FemaleSpermatogenesisSperm MotilityChromosomes, Human, YSpermatozoaMesteroloneTestisHydrocarbons, BrominatedAsthenozoospermiaVaricoceleSemen AnalysisSemenTestosteroneReproductive Techniques, AssistedFertilitySeminal Plasma ProteinsSertoli Cell-Only SyndromeY ChromosomeGene FrequencyFertilization in VitroSperm Injections, IntracytoplasmicAndrologySex Chromosome Disorders of Sex DevelopmentPregnancyOrchitisSex Chromosome AberrationsAbnormal KaryotypeSperm RetrievalSpermatidsEpididymisVasovasostomySertoli CellsProtaminesReproductive TechniquesSperm TailFallopian Tube DiseasesPregnancy RateChromosome DeletionSeminiferous TubulesKlinefelter SyndromeEjaculationReproductive MedicineSperm-Ovum InteractionsTesticular DiseasesKartagener SyndromeSperm MaturationAcrosomeFertility Agents, MaleCase-Control StudiesInsemination, ArtificialFertilizationGenital Diseases, MaleMutationCryptorchidismSequence Tagged SitesEndometriosisCiliary Motility DisordersSpermatogoniaHysterosalpingographyAcrosome ReactionFollicle Stimulating HormonePregnancy OutcomeSpermatocytesSperm HeadHypogonadismAxonemal DyneinsEpididymitisGenotypeMeiosisEjaculatory DuctsPolymorphism, GeneticGene DeletionPolymorphism, Single NucleotideVas DeferensPolymerase Chain ReactionEmbryo TransferChromosome AberrationsClomipheneHaplotypesZona PellucidaMicrosurgeryAllelesUrologic Surgical Procedures, MaleInseminationSperm CapacitationBase SequencePhenotypeAnovulationTesticular NeoplasmsGerm CellsDNA Mutational AnalysisGenetic Predisposition to DiseaseGenetic LociMice, KnockoutHomozygote