AzoospermiaOligospermiaInfertility, MaleSperm CountChromosomes, Human, YSpermatogenesisMesteroloneTestisSperm RetrievalSperm MotilitySpermatozoaHydrocarbons, BrominatedSeminal Plasma ProteinsTestosteroneTesticular DiseasesSperm Injections, IntracytoplasmicSex Chromosome Disorders of Sex DevelopmentSex Chromosome AberrationsKlinefelter SyndromeY ChromosomeVasovasostomyMicrosurgerySemenVasectomyReproductive TechniquesContraceptive Agents, MaleSpermatidsSequence Tagged SitesEpididymisSemen AnalysisSuctionVas DeferensXYY KaryotypeVaricoceleTissue and Organ HarvestingEjaculationCryopreservationFollicle Stimulating HormoneChromosome DeletionGenetic LociEmbryo TransferPregnancy RateEjaculatory DuctsSemen PreservationBiopsyMicroinjectionsFertilization in VitroSertoli CellsEpitestosteroneTuberculosis, Male GenitalPregnancySperm MaturationAsthenozoospermiaFertilityGonadal Dysgenesis, MixedInhibinsEpididymitisCryptorchidismPregnancy OutcomeAbnormal KaryotypeRNA-Binding ProteinsGene DeletionSeminiferous TubulesDesogestrelKaryotypingGenital Diseases, Male