Skull theory please!

[yeahyeahblah]

This is from a 16 week ultrasound a couple days ago...is skull theory still valid at this point? Anyways, please make a guess, here it is!
https://i288.photobucket.com/albums/ll197/renwebpower/IMG_1776.JPG_zpshcrupoal.jpg

 

[Zeppelin424]

Girl guess

 

[Jbree]

Boy xx