I can tell you that with my first pregnancy I noticed a stretch-mark at around 32 weeks or something. That guy invited all his friends and before I knew it- stretch mark city. I will not be posting any pictures for fear of scaring everyone! I freak out when even a tiny bit of tummy or hip peeks out on accident, like with a wrap skirt malfunction.
Oh I just thought of something! We'll all be pregnant through October- that means we can do jack-o-lantern tummies! Hooray! Pumpkin tums are the best!