To help diagnose antiphospholipid syndrome (APS); to assist diagnose the explanation for an unexplained grume (thrombotic episode or venous thromboembolism); to assist determine the reason behind recurrent miscarriages in women.
When you have signs and symptoms of APS and/or have had one or more unexplained blood clots during a vein or artery; once you have had over one miscarriage, especially in the second and third trimesters of pregnancy.