PlacentaPlacenta DiseasesPregnancyTrophoblastsPlacenta PreviaChorionic VilliPlacenta AccretaPlacenta, RetainedMaternal-Fetal ExchangePregnancy ProteinsPlacentationPregnancy Trimester, FirstChoriocarcinomaPregnancy Trimester, ThirdPre-EclampsiaExtraembryonic MembranesChorionFetusGestational AgeDeciduaPlacental LactogenPlacental ExtractsAmnionPlacental CirculationPregnancy TrimestersFetal Growth RetardationLabor, ObstetricPlacental HormonesEstradiol DehydrogenasesHydatidiform MoleMolecular Sequence DataImmunohistochemistryPregnancy Trimester, SecondBase SequenceFetal DevelopmentAmino Acid SequencePregnancy, AnimalMolecular WeightUmbilical CordPregnancy Complications, ParasiticChorioamnionitisKineticsGenomic ImprintingElectrophoresis, Polyacrylamide GelPregnancy ComplicationsAmniotic FluidPregnancy-Specific beta 1-GlycoproteinsUterusChromatography, AffinityUterine NeoplasmsGene ExpressionCesarean SectionFetal BloodCloning, MolecularBlotting, NorthernAnnexinsAmino Acid Transport System ATissue DistributionReverse Transcriptase Polymerase Chain ReactionBlotting, WesternCells, CulturedPregnancy in DiabeticsDNA, ComplementaryAnnexin A3RNA, MessengerAbortion, VeterinaryChorionic GonadotropinChromatography, GelDNAGene Expression Regulation, DevelopmentalVascular Endothelial Growth Factor Receptor-1Pregnancy Complications, InfectiousTerm BirthSubstrate SpecificityMicrosomesInfant, NewbornAmino AcidsAmino Acid Transport System y+LHydroxysteroid DehydrogenasesSteryl-SulfataseTrophoblastic NeoplasmsChromatography, Ion ExchangeObstetric Labor, PrematureYolk SacReceptors, Cell SurfaceOrgan SpecificityFetal DeathChromatography, DEAE-CelluloseMicrovilliMonoamine OxidaseCattleGene Expression Regulation11-beta-Hydroxysteroid Dehydrogenases