Sertoli Cell-Only SyndromeSertoli CellsSpermatogenesisTestisSyndromeSeminiferous TubulesSertoli Cell TumorSpermatidsSeminiferous EpitheliumSpermatocytesSpermatogoniaSpermatozoaBlood-Testis BarrierInfertility, MaleLeydig CellsFollicle Stimulating HormoneSperm CountTestosteroneDown SyndromeMetabolic Syndrome XSexual MaturationGerm CellsMeiosisReceptors, FSHOligospermiaCells, CulturedFertilityCryptorchidismEpididymisAzoospermiaAndrogen-Binding ProteinRNA, MessengerOrgan SizeTesticular DiseasesNephrotic SyndromeInhibinsImmunohistochemistryCell DifferentiationSperm MaturationSjogren's SyndromeMolecular Sequence DataAntispermatogenic AgentsTesticular HormonesContraceptive Agents, MaleGene Expression Regulation, DevelopmentalRats, Sprague-DawleyMutationBase SequenceReverse Transcriptase Polymerase Chain ReactionMice, Inbred C57BLTurner SyndromeMice, KnockoutKlinefelter SyndromeClusterinPhenotypeMicroscopy, Electron