Tests and diagnosis

By Mayo Clinic Staff

If you have one or more episodes of thrombosis or pregnancy loss that are not explained by known health conditions, your doctor can schedule blood tests to check for abnormal clotting and for the presence of antibodies to phospholipid-binding proteins.

Blood tests for antiphospholipid syndrome look for at least one of the following three antibodies in your blood:

  • Lupus anticoagulant
  • Anti-cardiolipin
  • Beta-2 glycoprotein I

To confirm a diagnosis of antiphospholipid syndrome, the antibodies must appear in your blood at least twice, in tests conducted at least 12 weeks apart.

April 15, 2014