Likelihood FunctionsSensitivity and SpecificityROC CurvePredictive Value of TestsModels, StatisticalReproducibility of ResultsModels, GeneticProspective StudiesAlgorithmsProbabilityBayes TheoremComputer SimulationDown SyndromePregnancy Trimester, SecondFalse Positive ReactionsData Interpretation, StatisticalDiagnostic Techniques and ProceduresArea Under CurveAdnexa UteriPleural EffusionPhysical ExaminationPaternityLogistic ModelsDiagnostic Tests, RoutineBiological MarkersNuchal Translucency MeasurementRetrospective StudiesAdnexal DiseasesPregnancyUltrasonography, PrenatalCrown-Rump LengthNasal BoneFalse Negative ReactionsRisk FactorsDecision Support TechniquesStatistical DistributionsCohort StudiesRisk AssessmentPhylogenyEvolution, MolecularMass ScreeningPregnancy Trimester, FirstMonte Carlo MethodDiagnosisBiometryConfidence IntervalsCross-Sectional StudiesGenetic MarkersObserver VariationCase-Control StudiesOdds RatioGenotypeUterine HemorrhagePrognosisTuberculosis, PleuralGenetic LinkageSeverity of Illness IndexRegression AnalysisAuscultationQuestionnairesUltrasonography, DopplerDouglas' PouchChi-Square DistributionMarkov ChainsEpidemiologic MethodsTime FactorsPolymorphism, Single NucleotideSoftwarePoint-of-Care SystemsInfant, NewbornGenetic VariationCalcitoninReference StandardsGestational AgeGenetic Predisposition to DiseaseMultivariate AnalysisGenetic HeterogeneityChromosome MappingDiscriminant AnalysisAge FactorsEndometriosisTreatment OutcomeLinkage DisequilibriumModels, TheoreticalFollow-Up StudiesChorionic Gonadotropin, beta Subunit, HumanDiagnostic Techniques, OphthalmologicalSelection, GeneticTriageRiskUnited StatesAllelesTomography, X-Ray ComputedChest PainNeckPrevalenceMedical History TakingDiagnosis, Computer-AssistedPregnancy-Associated Plasma Protein-AReference Values