Antibodies, AntiphospholipidAntiphospholipid SyndromeAntibodies, AnticardiolipinLupus Coagulation Inhibitorbeta 2-Glycoprotein IMigraine DisordersMigraine with AuraAntibodiesCardiolipinsLupus Erythematosus, SystemicThrombosisMigraine without AuraAbortion, HabitualAntibody SpecificityThrombophiliaCatastrophic IllnessAutoantibodiesAntibodies, MonoclonalImmunoglobulin GSneddon SyndromeAntibodies, ViralGlycoproteinsImmunoglobulin MAntibodies, BacterialAnticoagulantsHydroxychloroquinePregnancy ComplicationsPregnancy Complications, HematologicPregnancyPartial Thromboplastin TimeSkin Diseases, VascularLupus Vasculitis, Central Nervous SystemAntibodies, AntinuclearAntibody FormationBinding Sites, AntibodyPhospholipidsAntibodies, NeutralizingAbortion, SpontaneousPanniculitis, Lupus ErythematosusProthrombinWarfarinVenous ThrombosisAntibody AffinityEnzyme-Linked Immunosorbent AssayAnetodermaPulmonary EmbolismEpitopesBlood Coagulation FactorsActivated Protein C ResistanceAnnexin A5AspirinFluorescent Antibody TechniqueAutoimmune DiseasesFetal DeathThromboplastinAntibodies, Anti-IdiotypicThrombocytopeniaThromboembolismPhosphatidylserinesGangreneFactor VMyelitis, TransverseEclampsiaTrophoblastsHeparin, Low-Molecular-WeightRisk FactorsCross ReactionsBlood CoagulationHIV AntibodiesPregnancy OutcomeThrombin TimeEndocarditisThrombophlebitisAntibodies, NeoplasmAntibodies, ProtozoanHeparinImmunoglobulin AHeart Valve DiseasesBiological MarkersProtein CAntigen-Antibody ReactionsProspective StudiesVasculitisHLA-DR2 AntigenVenous ThromboembolismInternational Normalized RatioPlacental InsufficiencyCerebrovascular DisordersPrednisolonePlasmapheresisMice, Inbred BALB CImmunoglobulin Fab FragmentsRetrospective StudiesEmbryo ImplantationAntibodies, FungalImmunoglobulinsMolecular Sequence DataBlood Coagulation TestsProtein S DeficiencyCase-Control Studies