In my mind, I usually think that I lost it naturally, but in actuality, I exercised a lot to lose it. I gained 54 pounds onto my 112 pound body when I was pregnant. I am a very active person, though, so it was "natural" for me to resume exercise when my ds was 5 days old. By the time he was 3 weeks old, I was putting him in the stroller and walking 4 miles a day. This, combined with nursing (I guess) took the weight off in about 8 weeks. But I have to say, I was also in really good physical condition, due to lots of exercise, before my pregnancy, so I think my metabolism had something to do with helping me. For me, lots of exercise is key- and then I eat everything I want to eat.