Sperm-Ovum InteractionsFertilization in VitroOvumOvuleAlstroemeriaGerm Cells, PlantFertilizationEgg YolkUrochordataSperm CountSperm HeadSperm CapacitationEgg ProteinsPollen TubeSeedsStarfishEgg ShellEgg WhiteRosaEndospermPollenPhloroglucinolFlowersSperm MaturationParasite Egg CountSperm TransportArabidopsisAcrosomeSperm Injections, IntracytoplasmicReproductionArabidopsis ProteinsInfertility, MaleGene Expression Regulation, PlantEgg HypersensitivitySperm MidpieceOvipositionZea maysZona PellucidaSemenSemen PreservationSperm BanksEpididymisPlant ProteinsGenes, PlantFertilitySemen AnalysisZygoteOocytesCell MembraneTestisVitelline MembraneEjaculationPotassiumMembrane PotentialsCryopreservationSperm WhaleOligospermiaEgg Proteins, DietaryEchinodermataSeminal Plasma ProteinsSpermatozoaInsemination, ArtificialSexual Behavior, AnimalProtaminesAsthenozoospermiaMicroinjectionsSea UrchinsSchistosoma mansoniOogenesisChickensOviductsFallopian TubesInseminationNesting BehaviorParthenogenesisCryoprotective AgentsMolecular Sequence DataAzoospermiaMeiosisOviparityPregnancyClutch SizeSeminal Vesicle Secretory ProteinsCopulationXenopus laevisEmbryo, NonmammalianAmino Acid SequenceXenopusTime FactorsVasectomyCalciumSchistosomiasis mansoniLarvaWhalesSpecies SpecificityCattlePregnancy RateGenitalia, MaleMicroscopy, ElectronHymenoptera