Prothrombin Time (PT), Activated Partial Thromboplastin Time (APTT), Factor II (prothrombin) mutation, Methyltetrahydrofolate Reductase C677T and A1298C Mutation, Protein S, Protein C, Protein C Activity, and Anticardiolipin Antibody, Antiphospholipid antibody, Plasminogen Activator Inhibitor 1 (PAI-1) Mutation, Factor XIII, Mixing Studies, Platelet Antibody.