13 weeks pregnant and gender confusion

[tm123x]

Hi all,

This is my 4th baby and I am so confused r.e nub! I had a scan at 12+4 which I then sent to the nubologists and got back 85% chance of baby being a girl - pic attached. I then went for another scan today due to bleeding (all is well) and couldn't see babys nub at all. Every single person in my first scan pics has said girl, apart from my sister who even admits she isn't sure!

Can anyone share some insight? Thank you! P.s yes I'm so impatient.

What is the nub theory?

I can’t see a nub in any of those pics but that is due to the angle of the picture. Honestly I would just wait another couple of weeks until you’re 16 weeks to be sure. I personally don’t rate “nubologists”