Well I'm a pretty busty even before pregnancy I was a C cup and now my boobs are past a DD :/ so maybe they account for some of that weight lol I wish I had a big butt! It's a little fuller now but not big. As for my belly, people think I'm already like 5-6months when I'm barely 4 lol
I was never near that small! Lol I'm 5'4 and my previous pregnancy weight was 150. It was all muscle tho because I didn't look like I weighed that much at all!! Anyways this is my first pregnancy, I'm 30w6d and so far I've gained 26lb!! :/ I don't know how I work out everyday. My baby doc said most of it must have went to my butt because my belly isn't that big.. my butt definitely got a lot bigger tho!! Lol
Weight also comes from Placenta ,amniotic fluid, your breast tissue , extra blood & the baby its self. That alone from one of my pregnancy books say its abt 30lbs already