Gender prediction - question with pic

These were taken at 13w3D
Update ** I am adding one more pic if that helps

Attachment 8855Attachment 8856

Thanks in advance.

Attachment 8891

What is the circled part?
Attachment 8941

Is there any nub? what about skull theory?

I'm guessing girl

BOY!

I don't see any clues.

i dont see clues sorry

Thank you ladies..... I am soooo hoping for a boy. But I have a gut feeling that it is a girl. I will be happy either way. I am 15 weeks now.... will schedule an appointment for 20W ultrasound pretty soon. I can totally go to an elective place ( only 99$) but I am just so nervous about finding out gender. I am worried about gender disappointment.

not sure I see any clues.

thanks Inky. So what is that white thing in the bottom? I thought that was nub.

Maybe boy?