The way they test is they will do one blood test looking for the clotting disorder, if it comes back positive they will test again 8-12 weeks later to confirm. My first test came back positive, my second came back negative but my GP explained that APS can be dormant or at such a low level that it would come back negative but would still cause issues. Pregnancy is also a trigger. GP agreed that I could start taking low dose aspirin as it causes no harm and voila, it's seems to have worked so far. Now I'm just waiting on the hospital to see how I will be managed. If you are diagnosed with APS you'll be recommended to start low dose aspirin or warfarin/heparin injections and your pregnancies will be managed as high risk. The good thing is, once managed the success rate for a live birth is great!