MicroRNAsEmbryonic DevelopmentGene Expression Regulation, DevelopmentalGene Expression ProfilingGene ExpressionGene Expression RegulationEmbryonic and Fetal DevelopmentBlastocystEmbryo, MammalianRNA, MessengerRNAEmbryo, NonmammalianEmbryo LossOocytesZygoteMolecular Sequence DataBase SequenceRNA, Small InterferingIn Situ HybridizationOligonucleotide Array Sequence AnalysisTranscription FactorsZebrafishRNA, ViralReverse Transcriptase Polymerase Chain ReactionPregnancyTranscription, GeneticFertilizationCell DifferentiationGene TargetingAmino Acid SequenceRNA SplicingSignal TransductionMutationPromoter Regions, GeneticRNA EditingHomeodomain ProteinsOogenesisEmbryo Culture TechniquesMice, KnockoutDNA-Binding ProteinsCells, CulturedEmbryonic Stem CellsZebrafish ProteinsGastrulaEmbryologyPhenotypeBody PatterningGastrulationCell LineMorphogenesisRNA InterferenceFertilization in VitroGerm LayersXenopus ProteinsTime FactorsBlastulaGene Expression Regulation, EnzymologicDNA, ComplementaryRNA, BacterialRNA, RibosomalXenopus laevisMorulaMice, Inbred C57BLOvumDNA PrimersGenes, LethalBlastomeresChick EmbryoNuclear ProteinsMesodermDrosophila ProteinsCell NucleusSequence Homology, Amino AcidEmbryo ImplantationGene Expression Regulation, NeoplasticMice, TransgenicEndodermCleavage Stage, OvumRepressor ProteinsDNA-Directed RNA PolymerasesCloning, MolecularDrosophilaBlotting, NorthernImmunohistochemistryCattleTrans-ActivatorsRNA-Binding ProteinsProtein BindingModels, BiologicalModels, GeneticDNAStem CellsSpermatozoaRNA VirusesGene Expression Regulation, PlantApoptosisDrosophila melanogasterMice, Mutant StrainsPolymerase Chain ReactionNervous System