Question re Nub Theory?

Hi Ladies,

I was just looking at the baby2see gender study website that a lot of you keep referring to while making a guess on the angle of the dangle, it says that it is most accurate when the fetus is 12 weeks old - 14 weeks Pregnant.....I'm just curious if that is what everyone is going by? Or are they putting up 12week pregnancy scans which means that the fetus is still only 10weeks? Sorry if this is a dumb question.... I have attached the link below :) thanks for your help!!

Ultrasound gender study - how accurate are fetal sex determination first trimester scans - Baby2see

Between a pregancy of 12 and 14 weeks, the nub is very accurate, before that stage mos of the nubs ars still in girl modus.. So the artikel says it right, best nub shown by a pregnancy week of 14 wks, feutus 12 wks old..

Do you have a pic of yours?