SpermatocytesSpermatogenesisCell NucleusSpermatidsTestisMeiosisSertoli CellsPachytene StageSpermatogoniaSpermatozoaSeminiferous TubulesSeminiferous EpitheliumMeiotic Prophase ISynaptonemal ComplexNucleus AccumbensProphaseChromosome PairingThalamic NucleiBlood-Testis BarrierInfertility, MaleSolitary NucleusChromosomesCochlear NucleusGerm CellsSperm CountRaphe NucleiDipteraCerebellar NucleiMetaphaseSeptal NucleiActive Transport, Cell NucleusRats, Sprague-DawleyArcuate NucleusCaudate NucleusMolecular Sequence DataImmunohistochemistryLeydig CellsParaventricular Hypothalamic NucleusSex ChromosomesNuclear ProteinsRNA, MessengerCytoplasmY ChromosomeFertilityIn Situ HybridizationSuprachiasmatic NucleusRed NucleusTrigeminal NucleiTriethylenemelamineSubthalamic NucleusMicroscopy, ElectronAmino Acid SequenceSalamandridaeSupraoptic NucleusBase SequenceEpididymisGene Expression Regulation, DevelopmentalOligospermiaHistonesOrthopteraOrgan SizeSex ChromatinMicroinjectionsChromatinGrasshoppersNeuronsSexual MaturationOncogene Proteins v-mosCryptorchidismAnaphaseFluorescent Antibody TechniqueNuclear EnvelopeDrosophila ProteinsTestosteroneGene ExpressionDNA-Binding ProteinsCyclin A1Microscopy, FluorescenceDrosophila melanogasterTime FactorsMice, Inbred C57BLApoptosisOocytesDNAOlivary NucleusAcrosomeMitosisIn Situ Nick-End LabelingBlotting, WesternCells, CulturedMutationHaploidyMicrotubulesTranscription, GeneticSpindle ApparatusRats, WistarEthylene GlycolsBlotting, NorthernCell NucleolusMice, Knockout