Weird question 🤔

Michelle • Baby #3 Due Nov. 👧🏻💕

So I’ve been looking at ultrasound pics people on here post and I noticed how small other womens uterus are measuring at close to the same week as me. I’ll be 9 weeks Saturday but everyone else’s looks like it’s made for 1 baby but mine looks huge already like it could fit 2 or more! I know everyone is different... but what in the world? Why is my uterus expanding that much already? Is this normal?