Nub theory/ skull any experts out there 🙈

Amy

Hi ladies

This is my 13 week scan , I was trying to figure out the gender from the nub/skull theory just for some fun , but I have no clue what I’m meant to be looking for I’m not sure if

there is even a nub there 🙈😂

Any of you kind ladies wana have a guess ?

Thank you in advance 🙏