scan picture nub

[Sophienoble333]

Hi all, iv just had my 12 week scan and when on net stumbled across the 'nub theory' iv been looking at my picture and think I can see a nub but not sure if I think it's girl or boy. I already have a little boy and there wasn't a nub in his scan picture so it's hard to compare. Can anyone explain this theory to me. I want to upload my scan pic but unsure how to? Can anyone tell me how to :-) x

It takes a trained eye to be able to tell gender at that stage.

www.goodtoknow.co.uk/family/474180/Nub-theory--Predict-your-baby-s-sex-at-12-weeks

My friend just had a 12 week scan and the sonographer managed to get a real good pic of the nub and told my friend that if he would put his neck on the line and say it was a boy but to confirm at the ??week scan. I didn't really believe it and googled it and found this. There are better comparison pics if you look but this is the first to come up.
Have fun figuring it out