Extraembryonic MembranesOviparitySerous MembraneViviparity, NonmammalianAllantoisChoroid PlexusChorioallantoic MembraneChoroidUterusPregnancyChoroid Plexus NeoplasmsEndodermMembranesCell MembraneMembrane LipidsIntracellular MembranesYolk SacMembrane PotentialsEmbryo, MammalianMembranes, ArtificialGastrulaGene Expression Regulation, DevelopmentalPapilloma, Choroid PlexusChoroid NeoplasmsTrophoblastsEctodermEmbryonic and Fetal DevelopmentErythrocyte MembraneMembrane FluidityEmbryonic DevelopmentBlastocystPlacentaAmnionCell Membrane PermeabilityChorionBasement MembraneChimeraGerm LayersEmbryo LossCell LineageMesodermIn Situ HybridizationGATA6 Transcription FactorEmbryonic Stem CellsCell DifferentiationModels, BiologicalMembrane Transport ProteinsDosage Compensation, GeneticMolecular Sequence DataCell LineBlastodermMembrane GlycoproteinsCells, CulturedGenomic ImprintingSOXF Transcription FactorsChoroid DiseasesChick EmbryoMicroscopy, ElectronMutationBase SequenceLipid BilayersVisceraEmbryonic InductionGene TargetingMorphogenesisGenes, LethalVitelline DuctRNA, MessengerMitochondrial MembranesBody PatterningProtein TransportGerm CellsHyalinEmbryo, NonmammalianMice, Inbred C57BLSignal TransductionSynaptic MembranesX Chromosome InactivationAmino Acid SequenceTime FactorsBone Morphogenetic Protein 4ImmunohistochemistryX Chromosome