I just came across the most accurate description of the postpartum belly I've ever read, and it wasn't in a medical text. Perhaps you should read this only if you've had a child; it's a bit much for the uninitiated.
Oh, but my stomach, she is like a waterbed covered with flannel now. When I lie on my side in bed, my stomach lies politely beside me, like a puppy.
- from Anne Lamott's Operating Instructions: A Journal of My Son's First Year