what is the two dot theory?

[cherietschudi]

I am unsure what a two dot theory is for boys...I know the three line thing for girls. Also how do I know what side my placenta is? thanks so much for the help :) I have attache ultrasound pics just in case18028

[coocoobananas]

I'm pretty sure that's a boy nub:)

[Mulberry Smurf]

Very boyish nub xx