Or until you have another, and mistakenly look back at pictures from your first. Man, that was a bad idea. I'm already way bigger than I was when Katy was born (at 42 weeks).
20 week belly the first time = 10-12 week belly the second time, for me anyhow. That was really depressing!
I'll be excited to get back down to the size of some of the 12-16 week bellies posted earlier in this thread!