Can u really tell the gender??

So, I have seen on here many women posting about skull theories and other ways to tell the gender based on sonogram photos. (I have no idea how to even tell) Well, I got a genetics testing done that I'll have the results for this week.

So I want to test these theories and see if they're correct. Any theory is welcome as im not sure of all of them anyways. For fun, can y'all guess n see if these theories are accurate?I'll be sure to update and let y'all know as soon as I know! Promise!!

1st pic is transvaginal done at 5 weeks

2nd pic was done today at 12 weeks

Alright ladies.... LET THE THEORY GUESSING BEGIN!! (please post what theory it is you use based in your guess)