Obstetrical ForcepsSurgical InstrumentsExtraction, ObstetricalVacuum Extraction, ObstetricalDelivery, ObstetricElectrocoagulationFetal DistressDisposable EquipmentBirth InjuriesEpisiotomyBronchoscopesBronchoscopyEndoscopesLacerationsForeign BodiesLabor Stage, SecondBiopsyPerineumEndoscopyEquipment DesignObstetric Labor ComplicationsEquipment ReuseNumismaticsNatural Orifice Endoscopic SurgerySurgical EquipmentDilatationEndoscopy, Digestive SystemCystoscopesCesarean SectionObstetricsMultiple Pulmonary NodulesGastroscopyPelvic FloorParturitionGastroscopesAnesthesia, ObstetricalVersion, FetalTracheostomyMyiasisBronchial NeoplasmsPregnancyParityIntubationApgar ScoreDevice RemovalHistory, 16th CenturyCapsulorhexisLaparoscopesHistory, MedievalHair RemovalMicrosurgeryForeign-Body MigrationLabor, ObstetricLabor, InducedOphthalmologic Surgical ProceduresEndoscopy, GastrointestinalEsophageal DiseasesCatheterizationFiber Optic TechnologyEsophagusSpecimen HandlingMucous MembraneStomach DiseasesPolypsAnal CanalLaparoscopyVitrectomyIntraoperative ComplicationsRectumSmall Cell Lung CarcinomaCholangiopancreatography, Endoscopic RetrogradeDiffusion Tensor ImagingInfant, NewbornRetrospective StudiesPregnancy OutcomeProspective StudiesNerve Fibers, MyelinatedBiopsy, NeedleAnisotropySingle-Blind Method