I'm confused by those super high numbers. On the little graph I have, no one goes above 1:6000.

My T21 results were 1:4730 which gives me a maternal age of less than 15. I'm 29. I don't know what the others are but I'm assuming they're good 'cos they would have told me otherwise.

How unusual (your graph that is). Results from both of my pregnancies have been well above 1 in 6000 (over the age of 30 each time) so they most certainly can go above the upper limit on your graph. Weird ha? I'm pretty sure that I was not given a maternal age of less that 15 either, despite have a greater ratio than yours. Can't explain it though?

ETA : Unless your graph give scan results only (not combined results from blood test AND scan)?