ChorioamnionitisNeutrophilsFetal Membranes, Premature RuptureAmniotic FluidPregnancyObstetric Labor, PrematureAmnionExtraembryonic MembranesChorionNeutrophil InfiltrationUreaplasma InfectionsSuperficial Back MusclesPremature BirthGestational AgeInfant, PrematurePlacentaObserver VariationPregnancy Complications, InfectiousInfant, NewbornUreaplasmaBronchopulmonary DysplasiaReproducibility of ResultsN-Formylmethionine Leucyl-PhenylalanineLabor, ObstetricLeukemoid ReactionAbortion, SepticAdrenergic beta-3 Receptor AgonistsTerm BirthSheep, DomesticInfant, Premature, DiseasesHistocompatibility, Maternal-FetalChemotaxis, LeukocyteFetusInterleukin-8Umbilical CordRespiratory Distress Syndrome, NewbornAmniocentesisAbruptio PlacentaeLeukocyte CountSheepLipopolysaccharidesEndometritisMatrix Metalloproteinase 8Time FactorsInflammationSepsisFetal DistressDefensinsRetrospective StudiesFetal DeathPeroxidaseDelivery, ObstetricBronchoalveolar Lavage FluidInterleukin-1alphaBetamethasoneAntigens, CD18Lenses, IntraocularLungMeconiumFetal Organ MaturityChemokine CXCL10Placenta DiseasesPhagocytosisSuperoxidesChemokine CXCL11Chemotactic FactorsProspective StudiesUreaplasma urealyticum