Hi,
i'm not too sure what the XXXXXXX number is as my last bub was a 1:4 chance... given my age is only 21 that was scary. i had a CVS and it turned out my little girl had no chromosone abnormalities, however she did not make it due to another rare developmental problem. So i guess there is hope for those out there who get a very high risk result. Let's hope this bubba's NT results come back much better and all is good!