Antiphospholipid syndrome (APS) is an autoimmune disorder caused by antiphospholipid antibodies. It was characterized by excessive clotting of blood and/or certain complications of pregnancy (premature miscarriages, unexplained fetal death, or premature birth) and the presence of antiphospholipid antibodies (such as anti-cardiolipin antibodies or lupus anticoagulant) in the blood. Fifty percent…