ChorioamnionitisAnti-Bacterial AgentsFetal Membranes, Premature RuptureAmniotic FluidBacteremiaPregnancyObstetric Labor, PrematureBacterial InfectionsAmnionGram-Negative Bacterial InfectionsEmpirical ResearchExtraembryonic MembranesSepsisChorionFeverDrug Resistance, BacterialMicrobial Sensitivity TestsCommunity-Acquired InfectionsInfant, NewbornGram-Negative BacteriaEnterocolitis, NecrotizingUreaplasma InfectionsPremature BirthPneumonia, BacterialCross InfectionGram-Positive Bacterial InfectionsNeutropeniaGestational AgePenicillanic AcidInfant, PrematurePlacentaIntensive Care UnitsDrug UtilizationPregnancy Complications, InfectiousRetrospective StudiesUrinary Tract InfectionsAnti-Infective AgentsStaphylococcal InfectionsMethicillin-Resistant Staphylococcus aureusDrug Resistance, MicrobialBacteriaDrug Resistance, Multiple, BacterialUreaplasmaTreatment OutcomeProspective StudiesAntibiotic ProphylaxisBronchopulmonary DysplasiaLabor, ObstetricLeukemoid ReactionAbortion, SepticEscherichia coli InfectionsAdrenergic beta-3 Receptor AgonistsRisk FactorsInfant, Premature, DiseasesTerm BirthSheep, DomesticCohort StudiesHistocompatibility, Maternal-FetalEscherichia coliDrug Therapy, CombinationFetusUmbilical CordRespiratory Distress Syndrome, NewbornAmniocentesisAbruptio PlacentaeLength of StayEndometritisSheepFetal DistressFetal DeathDelivery, ObstetricStreptomycesBetamethasoneMeconiumFetal Organ MaturityAntibiotics, AntineoplasticAminoglycosidesPlacenta DiseasesInterleukin-1alphaUreaplasma urealyticumMultivariate AnalysisChemokine CXCL10Chemokine CXCL11Pregnancy OutcomeMatrix Metalloproteinase 8