The Beta-2-Glycoprotein-1 antibodies test is a blood test to detect the beta-2 glycoprotein antibodies IgA, IgG and IgM in the blood. Beta-2 glycoprotein 1 antibody is an autoantibody which is associated with unsuitable blood clotting. The test is used to help in the diagnosis of inappropriate blood clot formation (a thrombotic episode), to identify cause of recurrent miscarriage and in the diagnosis of antiphospholipid syndrome (APS). The beta-2 GP-1 antibody test may be ordered when there is an unexplained blood clot in a vein or artery. Other symptoms may include shortness of breath, pain and swelling of the extremities and headaches.