Infertility, MaleSpermatoceleSemenSemen AnalysisSperm CountAsthenozoospermiaSpermatozoaVaricoceleSperm MotilityOligospermiaInfertilityInfertility, FemaleAzoospermiaSpermatogenesisFertilitySemen PreservationEjaculationChromosomes, Human, YTestisSexual AbstinenceSperm BanksMasturbationFertilization in VitroPregnancyPregnancy RateSperm Injections, IntracytoplasmicReproductive Techniques, AssistedGenital Diseases, MaleAcrosomeSeminal Plasma ProteinsChromomycin A3AndrologyDNA FragmentationCryopreservationGenitalia, MaleAneuploidyInsemination, Artificial, HomologousTestosteroneInsemination, ArtificialChromosomes, Human, XY ChromosomeSertoli Cell-Only SyndromeSex Chromosome Disorders of Sex DevelopmentSperm RetrievalOrchitisSex Chromosome AberrationsFollicle Stimulating HormoneChromosomes, Human, Pair 18EpididymisAbnormal KaryotypeSpermatidsReproductive TechniquesVasovasostomyProtaminesSertoli CellsIn Situ Hybridization, FluorescenceChromosomes, Human, Pair 13Sperm TailFallopian Tube DiseasesCase-Control StudiesReference ValuesSperm-Ovum InteractionsSeminiferous TubulesChromosome DeletionFertilizationTesticular DiseasesReproductive MedicineKlinefelter SyndromeKaryotypingAcrosome ReactionSperm MaturationSperm HeadRetrospective StudiesCryptorchidism