IleumDelayed DiagnosisPrenatal DiagnosisEarly DiagnosisSensitivity and SpecificityDiagnosisGuinea PigsRetrospective StudiesMyenteric PlexusIleal DiseasesIleitisMuscle, SmoothDiagnostic ErrorsIntestine, SmallIntestinal MucosaBiopsyTomography, X-Ray ComputedNursing DiagnosisIleal NeoplasmsDiagnosis, Computer-AssistedTime FactorsMuscle ContractionPredictive Value of TestsReproducibility of ResultsProspective StudiesPreimplantation DiagnosisDuodenumTreatment OutcomePrognosisFollow-Up StudiesPolymerase Chain ReactionColonMagnetic Resonance ImagingInfant, NewbornIntestinesPregnancyIntestinal AbsorptionRisk FactorsFatal OutcomeGastrointestinal MotilityBiopsy, NeedleFetal DiseasesIleocecal ValveDiphenylacetic AcidsCohort StudiesIncidenceAge FactorsAtropineIntestinal DiseasesCrohn DiseaseBiological MarkersAcute DiseaseCase-Control StudiesPrevalenceSwineFalse Positive ReactionsUltrasonography, PrenatalEnzyme-Linked Immunosorbent AssayClinical Laboratory TechniquesROC CurveFalse Negative ReactionsSeverity of Illness IndexImmunohistochemistrySyndromeCecumUnited StatesPeristalsisAcetylcholineUltrasonographyTumor Markers, BiologicalMolecular Diagnostic TechniquesIntestinal ObstructionEndoscopy, GastrointestinalBiopsy, Fine-NeedleGastrointestinal ContentsBreast NeoplasmsPhysical Examination