Thanks for all your answers. I am so angry because I went to take this test by myself (I paid) just to rule out the possiblity of antiphospholipid syndrome, because stroke and cardio-vascular disease runs in our family.Unforunately my test was positive, low to moderate. I have to check once again. But now I am pregnant. I am very very scared of getting Heparin and bleeding to death. I did not have TIAs or stroke, I had migraines with aura (or are that just small tias, dont know). I have also a patent foramen ovale (a hole between two chambers of the heart). Are there any test that can predict if you will have bleeding after taking Heparin?