TrophoblastsCell DifferentiationPlacentaPlacentationPregnancyChoriocarcinomaChorionic VilliCells, CulturedPregnancy Trimester, FirstEmbryo ImplantationGene Expression Regulation, DevelopmentalDeciduaCell LineBlastocystPregnancy ProteinsRNA, MessengerEmbryo, MammalianStem CellsCell LineageEmbryonic Stem CellsTranscription FactorsSignal TransductionHLA-G AntigensGene Expression RegulationImmunohistochemistryReverse Transcriptase Polymerase Chain ReactionEmbryonic DevelopmentGiant CellsEmbryo, NonmammalianCell DivisionMolecular Sequence DataCell ProliferationGene ExpressionBase SequenceIn Situ HybridizationPlacental LactogenMaternal-Fetal ExchangeCell MovementDNA-Binding ProteinsHomeodomain ProteinsMice, Inbred C57BLUterusChorionPre-EclampsiaTretinoinBlotting, WesternEndometriumMice, KnockoutTranscription, GeneticMice, TransgenicPhenotypeApoptosisGestational AgeModels, BiologicalPromoter Regions, GeneticPlacenta DiseasesPregnancy, AnimalTime FactorsGene Expression ProfilingCell Culture TechniquesFlow CytometryChorionic GonadotropinTransfectionNuclear ProteinsEmbryonic and Fetal DevelopmentBasic Helix-Loop-Helix Transcription FactorsCell FusionCoculture TechniquesAmino Acid SequenceCell AdhesionFluorescent Antibody TechniqueBlotting, NorthernTumor Cells, CulturedDown-RegulationUterine NeoplasmsCell CycleSex DifferentiationCell SurvivalUp-RegulationEndodermChick EmbryoMorphogenesisDNA PrimersRepressor ProteinsCarcinoma, EmbryonalTrans-ActivatorsRNA, Small InterferingMesodermKeratinsPregnancy Trimester, ThirdCell NucleusFetusCell CommunicationEmbryo LossTeratomaCell AggregationEpithelial CellsCell Line, TumorEctodermMutation