Sperm-Ovum InteractionsFertilization in VitroOvuleOvumAlstroemeriaGerm Cells, PlantUrochordataFertilizationPollen TubeSeedsStarfishRosaEndospermPhloroglucinolPollenEgg YolkFlowersArabidopsisEgg ProteinsArabidopsis ProteinsEgg ShellGene Expression Regulation, PlantEgg WhiteZea maysPlant ProteinsGenes, PlantReproductionParasite Egg CountPotassiumMembrane PotentialsEgg HypersensitivityCell MembraneOvipositionZygoteEgg Proteins, DietaryVitelline MembraneSpermatozoaOocytesSchistosoma mansoniNesting BehaviorEchinodermataChickensOogenesis