Geniculate BodiesCell NucleusSperm HeadSpermatozoaProtaminesSperm-Ovum InteractionsSperm CountFertilizationOvumSperm CapacitationChromatinNucleus AccumbensMicroinjectionsInfertility, MaleOocytesActive Transport, Cell NucleusSperm Injections, IntracytoplasmicCytoplasmThalamic NucleiChromosomesSolitary NucleusSpermatidsAcrosomeNucleoplasminsCochlear NucleusIn Situ Hybridization, FluorescenceNuclear Transfer TechniquesZygoteClupeineSperm MaturationRaphe NucleiCell ExtractsSemen PreservationEpididymisCerebellar NucleiSeptal NucleiMetaphaseArcuate NucleusCaudate NucleusDNADithiothreitolAneuploidyParaventricular Hypothalamic NucleusNuclear ProteinsSpermatogenesisNuclear MatrixSperm TransportMicroscopy, ElectronY ChromosomeMicroscopy, FluorescenceMeiosisSuprachiasmatic NucleusMolecular Sequence DataCell Nucleus ShapeRed NucleusPhascolarctidaeDiploidyTrigeminal NucleiFertilityOligospermiaSubthalamic NucleusSupraoptic NucleusMesocricetusSperm MidpieceChinchillaHistonesAmino Acid SequenceFertilization in VitroTime FactorsSea UrchinsNeuronsSex ChromosomesSperm BanksSemenNuclear EnvelopeMicroscopy, Phase-ContrastTestisCricetinaeDNA ReplicationXenopusXenopus laevisHeLa CellsRats, Sprague-DawleyMitosisOlivary NucleusCell LineImmunohistochemistryCell Nucleus SizeSemen AnalysisChromosomes, Human, Pair 18Sperm MotilityCloning, OrganismZona PellucidaCattleTrigeminal Nucleus, SpinalVentral Thalamic NucleiRNA, MessengerCell NucleolusBrain StemFluorescent Antibody Technique