PlacentaLabor, ObstetricLabor, InducedLabor OnsetLabor PainObstetric Labor, PrematurePregnancyPlacenta DiseasesPlacenta PreviaPlacenta AccretaPlacenta, RetainedObstetric Labor ComplicationsTrial of LaborTrophoblastsLabor PresentationLabor Stage, ThirdCesarean SectionDelivery, ObstetricExtraembryonic MembranesMaternal-Fetal ExchangeOxytocicsChorionic VilliGestational AgeAmnionMyometriumPregnancy ProteinsPregnancy Trimester, ThirdPlacentationChorionTerm BirthChorioamnionitisAmniotic FluidAnalgesia, EpiduralFetusTocolytic AgentsParturitionUterine ContractionPre-EclampsiaCervical RipeningPregnancy OutcomeUterusDeciduaFetal Membranes, Premature RuptureFetal MonitoringPregnancy, AnimalPregnancy, ProlongedPostpartum HemorrhagePregnancy ComplicationsInfant, NewbornParityFetal DeathPregnancy Trimester, FirstPregnancy Complications, InfectiousAnesthesia, ObstetricalPlacental LactogenCervix UteriPlacental CirculationFetal Growth RetardationUterine MonitoringDystociaPregnancy Trimester, SecondApgar ScoreUterine RuptureVaginal Birth after CesareanChoriocarcinomaUmbilical CordUltrasonography, PrenatalPremature BirthPlacental HormonesEmploymentTocolysisFetal BloodFetal DevelopmentMidwiferyNatural ChildbirthMeperidineImmunohistochemistryFetal DistressAbortion, VeterinaryBupivacainePelvimetryCesarean Section, RepeatObstetric NursingUterine HemorrhageUterine InertiaSufentanilAnesthesia, EpiduralPregnancy TrimestersPregnancy Complications, ParasiticTime FactorsMolecular Sequence DataAbruptio PlacentaeHydatidiform MoleGravidityYolk SacPostpartum PeriodPregnancy in DiabeticsMisoprostolGenomic ImprintingCervical Length Measurement