Medical Definition of APS
antiphospholipid syndrome; antiphospholipid antibody syndrome Antiphospholipid antibody syndrome (APS) refers to the association between antiphospholipid antibodies and thrombosis risk or pregnancy morbidity. Patients with APS may be at increased risk of recurrent arterial or venous thrombosis or pregnancy loss.— Wendy Lim et al., The Journal of the American Medical Association, 1 Mar. 2006
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