Gender guess, using scull & nub

Hi all, below are some of my 12 week scan pics, the baby is upside down on some of the pics.
I have had a 50/50 guess from friends and family so far what do you think.Attachment 14096Attachment 14097
Attachment 14107xxAttachment 14108

Thanks Katie xx

Sorry not seeing a nub in these pics and I'm not good at skull guesses. Congrats on your baby!