Infertility, MaleOligospermiaAzoospermiaInfertilitySperm CountInfertility, FemaleSpermatogenesisSperm MotilityChromosomes, Human, YSpermatozoaTestisMesteroloneHydrocarbons, BrominatedAsthenozoospermiaVaricoceleSemen AnalysisSemenTestosteroneReproductive Techniques, AssistedFertilitySeminal Plasma ProteinsSertoli Cell-Only SyndromeY ChromosomePregnancyFertilization in VitroSperm Injections, IntracytoplasmicAndrologySex Chromosome Disorders of Sex DevelopmentOrchitisSex Chromosome AberrationsAbnormal KaryotypeSpermatidsSperm RetrievalEpididymisVasovasostomySertoli CellsProtaminesReproductive TechniquesFallopian Tube DiseasesSperm TailPregnancy RateChromosome DeletionSeminiferous TubulesMice, KnockoutKlinefelter SyndromeReproductive MedicineVitamin A DeficiencyEjaculationTesticular DiseasesSperm-Ovum InteractionsMutationKartagener SyndromeSperm MaturationAcrosomeFertility Agents, MaleDeficiency DiseasesFertilizationInsemination, ArtificialCryptorchidismGenital Diseases, MaleSequence Tagged SitesHypogonadismEndometriosisSpermatogoniaCiliary Motility DisordersHysterosalpingographyalpha 1-Antitrypsin DeficiencyAcrosome ReactionFollicle Stimulating HormoneGene DeletionCase-Control StudiesVitamin B 12 DeficiencyPregnancy OutcomeSpermatocytesAxonemal DyneinsSperm HeadEpididymitisEjaculatory DuctsHomozygotePhenotypeMeiosisEmbryo TransferVas DeferensVitamin D DeficiencyClomipheneBase SequenceZona PellucidaPolymerase Chain ReactionMicrosurgeryUrologic Surgical Procedures, MaleMice, Inbred C57BLFolic Acid DeficiencyInseminationDNA Mutational AnalysisSperm CapacitationAnovulationGerm CellsTesticular NeoplasmsIgA DeficiencyThiamine Deficiency