OligospermiaInfertility, MaleAzoospermiaChromosomes, Human, YAsthenozoospermiaSperm CountSpermatozoaSperm MotilitySpermatogenesisSex Chromosome AberrationsSex Chromosome Disorders of Sex DevelopmentSemenVaricoceleSemen AnalysisMesteroloneTestisSeminal Plasma ProteinsHydrocarbons, BrominatedSequence Tagged SitesKlinefelter SyndromeAneuploidyY ChromosomeChromosome DeletionFertilityIn Situ Hybridization, FluorescenceSperm Injections, IntracytoplasmicKaryotypingChromosome AberrationsTestosteroneSertoli Cell-Only SyndromeProtaminesSpermatic CordPolymerase Chain ReactionEjaculationChromosomes, Human, Pair 18Chromosomes, Human, Pair 21Chromosomes, Human, Pair 13Genital Diseases, MaleChromosomes, Human, XPachytene StagePregnancyVasectomyAcrosome ReactionSperm HeadUrologic Surgical Procedures, MaleGenetic LociAbnormal KaryotypeSperm-Ovum InteractionsXYY KaryotypeMenCryptorchidismVasovasostomyTesticular DiseasesUreaplasma urealyticumEjaculatory DuctsTunisiaReproductive Techniques, AssistedDNA FragmentationCase-Control StudiesSpermatidsMeiosisMicrosurgerySynaptonemal ComplexFollicle Stimulating Hormone