There are a few... The criteria for the diagnosis of aps is based upon both clinical findings(what happens to you) and laboratory findings(results of blood tests). Some of the clinical findngs are a history of blood clots; fetal death over 10 weeks; delivery under 34 weeks due to preeclampsia; 3 or more recurrent miscarriages. Since aps can adversely affect a pregnancy, you need to discuss with your physician.
Clots or miscarriage. Blood clots, like deep venous thrombosis or DVT in the legs, or pulmonary embolism in the lungs, or pregnancy complications including recurrent early pregnancy loss (3 early miscarriages), 1+ late miscarriages, or severe pre-eclampsia. Antiphospholipid syndrome (aps) is less common than antiphospholipid antibodies (apa). If you have 2 or more miscarriages consult a fertility specialist (rei) md.