How does this all work??

Brittany

I've tried Googling, but I get better answers on here lol. What theory is what and how do they work? How soon do you try to apply one theory to an ultrasound/pregnancy? With all that being asked...here's mine at 6 weeks 5 days, vaginal ultrasound. And I know it's all just for fun, but I'm anxious and like playing with the idea of one thing over the other.