Gender scans.

I had a boy last time and it was very clear from 20 week scan that he was a boy. This time I'm having a girl although from the 12 week scan people have been saying baby looks like boy from the 'nub theory'. The ultrasound lady said at the time she was fairly sure it was girl at 20 weeks...
How many of you were told girl but gave birth to a boy?! 🙈🙊