PlacentaUmbilical VeinsUmbilical ArteriesPlacenta DiseasesPregnancyPlacenta PreviaPlacenta AccretaPlacenta, RetainedHernia, UmbilicalFetal BloodTrophoblastsMaternal-Fetal ExchangeHuman Umbilical Vein Endothelial CellsUmbilicusChorionic VilliFetusGestational AgePregnancy ProteinsPlacentationEndothelium, VascularUltrasonography, PrenatalPlacental CirculationFetal Growth RetardationPre-EclampsiaCord Blood Stem Cell TransplantationCells, CulturedPregnancy Trimester, ThirdInfant, NewbornChorionEndothelial CellsPregnancy Trimester, FirstExtraembryonic MembranesUterusPregnancy, AnimalCesarean SectionUltrasonography, DopplerPregnancy Trimester, SecondFetal DiseasesSingle Umbilical ArteryPlacental LactogenFetal DevelopmentAmniotic FluidDeciduaAmnionChoriocarcinomaPregnancy OutcomeFetal DeathLabor, ObstetricPregnancy ComplicationsBlood Flow VelocityImmunohistochemistryUrachal CystHeart Rate, FetalFetal DistressAllantoisFetal HypoxiaPlacental InsufficiencyChorioamnionitisAbortion, VeterinaryNeovascularization, PhysiologicPlacental HormonesMolecular Sequence DataCell AdhesionEndotheliumSheepPregnancy Complications, ParasiticYolk SacGene ExpressionReverse Transcriptase Polymerase Chain ReactionBase SequenceUltrasonography, Doppler, PulsedVascular Endothelial Growth Factor AUltrasonography, Doppler, ColorAborted FetusFetal MonitoringBlood BanksUmbilical CordPregnancy Complications, InfectiousWharton JellyMesenchymal Stromal CellsGene Expression RegulationHydatidiform MolePulsatile FlowPregnancy in DiabeticsVascular Endothelial Growth Factor Receptor-1Time FactorsGenomic ImprintingDelivery, ObstetricBlotting, WesternApgar ScoreAmino Acid SequencePlacental ExtractsBirth WeightCell MovementCell DifferentiationBlotting, NorthernTissue DistributionFetal HeartPregnancy TrimestersCell Line