Antithrombin deficiency Protein C deficiency Protein S deficiency Lupus anticoagulant Factor V Leiden Prothrombin Gene Mutation (PTGM) polymorphism Anti-β-2-Glycoprotein-1 antibodies Antiphospholipid screen (most commonly measured: anti-Cardiolipin antibodies) Resource(s): NHS South Tees Hospitals NHS Foundation Trusts: Thrombophilia screen