With my first i popped straight out (i always put it down to the ice-cream) i had a tummy at 3 months and just continued to grow, I had ppl tell me i was tiny at 7 months and the next week i was huge, so it all depends on a number of dif things and ppl and who they've seen preg, this time i'm already 3 months and no-one can tell im preg, even when im wearing skin tight tops (although i secretly am already wearing a belly band belt thingo cause my jeans are too tight they make me feel sick but they still fit thank god, im not ready to buy maternity clothes yet)