We got our blood test back for downs syndrome and NT defects and we're not recommended for further testing, does anyone know if 1 in 5400 is a good result? Also I've been told my blood has a hb of 15.9, but have no idea what that means can anyone explain? She asked me at the appointment if I smoke and I don't and never have but it's got me thinking there's something bad and when I tried to ask her to explain the results the phone rang and so I didn't get a response. Any ideas??