K.
your abdominal muscles could still be separated from your pregnancy, in which case, no matter HOW good a shape you're in, your stomach will "pooch out". If you lay on your back and do a gentle crunch and put your fingers on your navel, you shouldn't feel more than a 1-finger split. If you do, you need to do some exercises to help correct this. I suggest the book "Lose your Mummy Tummy" by Tupler (dumb name, good book). Also, once you've corrected the abdominal muscles, Pilates does wonders. The Chicago Park District has great classes by me for cheap. Probably at other locations too.