Antiphospholipid syndrome (APS) is a condition that causes blood clots to form in veins and arteries. It can also lead to miscarriages, stillbirths, and other pregnancy complications. Synonyms for APS include Hughes syndrome, sticky blood syndrome, and phospholipid antibody syndrome. These terms reflect the underlying causes of APS, including the presence of antibodies that target phospholipid molecules in the blood. Other possible synonyms for APS include lupus anticoagulant syndrome and hypercoagulable state. Diagnosis and treatment of APS require the expertise of a hematologist or rheumatologist, and may involve the use of blood thinners, immunosuppressants, and other medications.