Hi Abblestar, the date does make a difference and again, you fall just in the grey area. Although I have only done a handful of posts, i have actually studied this theory since my last daughter. Basically if you are in the 11th week, it is pretty much 50/50 whatever the nub looks like. From 12 weeks or the early part of 12 weeks, it can start to rise. The date the tech gave you i.e. 12+4, is definately the date to use the nub theory by. My guess is still a boy. I think it is definately shaped like a boy and also very slightly on the rise, but obvioulsy from your date, could rise more. I have seen girl nubs like this, but in most cases boy. Good luck with your boy, please keep us updated when you find out for sure.