Venous ThromboembolismThromboembolismVenous ThrombosisPulmonary EmbolismAnticoagulantsHeparin, Low-Molecular-WeightThrombophiliaThrombophlebitisPostoperative ComplicationsHemorrhageFibrin Fibrinogen Degradation ProductsEnoxaparinStockings, CompressionRisk FactorsWarfarinFactor VIntermittent Pneumatic Compression DevicesRecurrenceVena Cava FiltersIncidenceContraceptives, Oral, CombinedHeparinProthrombinVitamin KActivated Protein C ResistanceTreatment OutcomeDalteparinRetrospective StudiesInternational Normalized RatioFibrinolytic AgentsProspective StudiesRisk AssessmentPregnancy Complications, HematologicDesogestrelThrombosisPostthrombotic SyndromeAndrostenesPhlebographyFollow-Up StudiesBandagesProtein S DeficiencyProtein C DeficiencyLevonorgestrelThiophenesPregnancy Complications, CardiovascularTime Factorsbeta-AlanineCohort StudiesAustriaNeoplasmsFactor XaRiskPractice Guidelines as TopicNorpregnenesAcenocoumarolContraceptives, Oral, SyntheticArthroplasty, Replacement, KneeContraceptives, OralBlood CoagulationAdministration, OralCompression BandagesPyridonesInjections, SubcutaneousImmobilizationHospitalizationCase-Control StudiesArthroplasty, Replacement, HipOrthopedic ProceduresAntithrombinsProtein CAerospace MedicineGravity SuitsDouble-Blind MethodRandomized Controlled Trials as TopicIntraoperative ComplicationsHospital Bed Capacity, 300 to 499Blood Coagulation FactorsFactor VIIIGuideline AdherenceAntithrombin III DeficiencyPartial Thromboplastin TimeAcute DiseaseAge FactorsDrug Administration SchedulePremedicationPolysaccharidesPuerperal DisordersInpatientsAspirinFemoral VeinMorpholinesBlood Coagulation TestsAntiphospholipid SyndromeCatheterization, Central VenousAntibodies, AntiphospholipidEarly AmbulationRegistriesFactor V DeficiencyUnited StatesPregnancy