Embryo, MammalianEmbryo ImplantationPregnancy, AnimalEmbryo, NonmammalianPregnancyBlastocystUterusPregnancy ProteinsChick EmbryoEndometriumEmbryonic DevelopmentPregnancy MaintenanceEmbryonic and Fetal DevelopmentTrophoblastsPlacentaEmbryo LossGene Expression Regulation, DevelopmentalInterferon Type IAllantoisSheepProgesteroneExtraembryonic MembranesYolk SacFetusGestational AgeSwinePseudopregnancyEstrous CycleCulture TechniquesCorpus Luteum MaintenanceFetal WeightPlacentationEstrusSheep, DomesticCattleFertilization in VitroDeciduaIn Situ HybridizationCleavage Stage, OvumBlastomeresDeciduomaRNA, MessengerFetal DevelopmentHorsesEctodermCorpus LuteumFetal DeathDinoprostLitter SizeChorionEmbryo DispositionMorulaZygoteRetinol-Binding ProteinsZebrafishMaternal-Fetal ExchangeLuteolytic AgentsClonixinTime FactorsKeratin-18Embryo TransferCryopreservationGastrulaBody PatterningMolecular Sequence DataSuperovulationFetal ProteinsOocytesFertilizationPerissodactylaAmniotic FluidBody FluidsEmbryo ResearchEstradiolMorphogenesisGene ExpressionSingle Embryo TransferJaagsiekte sheep retrovirusCloning, OrganismProstaglandins FMesodermEstroneReverse Transcriptase Polymerase Chain ReactionOsteopontinMarsupialiaEctogenesisImmunohistochemistryNuclear Transfer TechniquesBase SequenceRetinol-Binding Proteins, PlasmaZebrafish ProteinsChimeraPregnancy RatePlacental LactogenAllantoinSus scrofaFallopian TubesOxytocinProteinsThermoluminescent Dosimetry