I've had friends who didn't show with their first until 18 weeks (and that was twins!) and over, but even though this is my first and I'm only 13 weeks I haven't fitted any of my jeans for weeks now.

I'm only slight in build, average height, and put on about 3 kilos in the first trimester (no m/s and a huge appetite). I noticed when my baby moved up from my lower abdomen to just below my belly button after 10/11 weeks. Now I think it's higher still. I had to buy the belly belt (great for holding off having to get maternity pants), but at least the size of my belly is being left behind the size of my breasts at this stage!!

I have given up thinking I'm going to be one of those mums who doesn't pop out until 5 months though...