Please guess girl or boy

Hi
I am a first time mum, to be.
I am desperately trying to guess the sex from 12w scan but not even sure if the line i see is the numb or part of the leg
I am even less sure with the skull theory, as the shape in this scan isnt clear to me.
Please tell.me your thoughts...and guesses or suggestions are sincerely appreciated 💚

Thank you

Sheena