Nub and Skull theory

Cassie • Sat, Mar 25 • • Ｍａｍ a • Ｗ iｆe • T e a c h e r • •Emilia Rose 09/29/17 •Lillian Marie 03/28/20 #girlmom

So I was looking into the Nub and Skull theory but I'm still having a hard time finding examples of what they are describing especially the Skull theory. This ultrasound is from 11 weeks. What do you all think who know about the theory?