Well before I lost about 200 pounds, I slimmed that albatross around my neck down by 60, so I think I can give you some advice here
Not to mention I did lose about 20 or so pounds of the 25 I put on this summer when I hurt my back.
First off -- more calories used than taken in is the ONLY way to lose. There is no other math, no other trick, no nothing, that will do it.
Heathers gone to extreme measures in her situation, but her health dictated it, and she looks fantastic.
Serge lost weight this year on his red wine diet I think he called it lol, and I think happiness might have helped LL with hers, since that glow she's sporting is not just from losing weight.
More important than losing weight and being skinny is that you are healthy. I think so many people, especially women, lose site of the fact that skinny is not healthy at some point. I'm not skinny like I was three years ago, heck I'll probably never weigh that little again -- it would mean another 15 pounds off, and I'm not sure I'd want to be that thin, tho at the time it suited me tremendously.
Talk to your doctor, he should be able to give you some very light excercises, like walking or swimming, that you can do while you are preggers to get yourself into the habit of doing something, then once you've had the baby you're so much further into good habits that will help take the weight off
