E.,
I'm currently pregnant with my 2nd boy due 8/27/07. I kept a pregnancy journal for my 1st son and have the same one for this one. Compared to my 1st pregnancy, my measurements are about 5 (yes, five) weeks bigger than I was with Jacob...and I started this pregnancy off weighing 17 pounds less than I did the first one. It could be how I'm carrying this one (more out than high), it could be a lot of things, I suppose.
At my last appointment, I was told that I seemed to be pretty big. Actually, his words were "You're a 'healthy' size. We need to keep an eye on that." My first son was 8 lbs 10oz. I'm a little worried about this one. The smallest child my mom delivered was 8-6 and my brother was 11-10. My sister was 9-6 and they took her 2 weeks early because of my mom's history with my brother. Had she gone to term, my sister would have been around the 11 pound mark, too. Her mother (my Grandma) never had a baby under 9 pounds and most were close to 10. After reminding my doctor of that, he noted the file and said we'd have to watch that, too.
As for the medicine-free delivery...I went in to the delivery room willing to try to go med-free, but it wasn't too long until I was getting some in the IV. Lol. I'll probably try that again and see what happens this time.
I think it's a choice you can make as you get closer to August and see how big your baby is at that point. Even then, they aren't always accurate. Maybe do what I did and say you want to start off med-free and see how it goes once you are in there.
Good luck and congrats!