Sperm-Ovum InteractionsOvuleOvumAlstroemeriaGerm Cells, PlantFertilization in VitroUrochordataFertilizationPollen TubeSeedsStarfishRosaEndospermPhloroglucinolPollenEgg YolkFlowersArabidopsisEgg ProteinsArabidopsis ProteinsEgg ShellGene Expression Regulation, PlantEgg WhiteZea maysPlant ProteinsGenes, PlantReproductionParasite Egg CountPotassiumMembrane PotentialsEgg HypersensitivityCell MembraneOvipositionZygoteEgg Proteins, DietaryVitelline MembraneSpermatozoaOocytesSchistosoma mansoniNesting BehaviorEchinodermataChickensOogenesisClutch SizeOviparityZona PellucidaSchistosomiasis mansoniHymenopteraParthenogenesisXenopusLarvaXenopus laevisEmbryo, NonmammalianAntigens, HelminthWaspsMuramidaseXenopus ProteinsSchistosomiasisOvomucinSchistosoma japonicumFertilityMolecular Sequence DataCleavage Stage, OvumMicroinjectionsOvum TransportAnthelminticsFecesOviductsMeiosisEnterobiusAscaris suum