Fetusalpha-FetoproteinsFetal ProteinsPregnancyGestational AgePregnancy, AnimalUltrasonography, PrenatalPlacentaPregnancy Trimester, SecondPregnancy Trimester, FirstInfant, NewbornPregnancy Trimester, ThirdEmbryonic and Fetal DevelopmentMaternal-Fetal ExchangeFetal DevelopmentFetal DiseasesPregnancy OutcomeGene Expression RegulationBirth WeightInfant, PrematureReverse Transcriptase Polymerase Chain ReactionLactationLitter SizeUterusFetal DeathPregnancy ComplicationsPrenatal Exposure Delayed EffectsFetal WeightBlotting, NorthernTranscription, GeneticAmniotic FluidProtein BiosynthesisPremature BirthFetal HeartAnimals, NewbornRNA, MessengerIn Situ HybridizationPregnancy, MultipleFetal Growth RetardationLabor, ObstetricObstetric Labor, PrematureRNA StabilityMaternal Nutritional Physiological PhenomenaSwineCells, CulturedCrown-Rump LengthLiverBase SequenceHeart Rate, FetalTime FactorsRats, Sprague-DawleyBody WeightTwinsAmino Acid SequencePlacental CirculationImmunohistochemistryCloning, MolecularOrgan SizeFetal BloodParityPrenatal DiagnosisTrophoblastsCell LinePregnancy TrimestersGene Expression Regulation, DevelopmentalPrenatal Nutritional Physiological PhenomenaMolecular Sequence DataCesarean SectionPre-EclampsiaPolymerase Chain ReactionNucleic Acid HybridizationMaternal Exposure3' Untranslated RegionsRNA-Binding ProteinsDNA, ComplementaryBlotting, WesternGene Expression Regulation, EnzymologicDNADNA PrimersFetal Organ MaturityMyometriumPostpartum PeriodAnimal Nutritional Physiological PhenomenaPregnancy Complications, CardiovascularReproductionAbortion, SpontaneousCattleExtraembryonic MembranesParturitionRats, WistarChorionPoly AEmbryo, MammalianPregnancy, High-RiskRNAHydrocortisonePlacentationReference ValuesAmniocentesisProspective Studies