I gained 35 pounds, went from 130 to 165. My son is now 1, but about 3-4 weeks after he was born i was back to pre pregnancy weight, all but five pounds. I now weigh about 136, but thats a little heavy for me. Anyway, i know that i lost the weight so rapidly because i breast fed. Your body burns about 500 calories a day making the milk and expelling it when you nurse. Also when your a new mom your so busy feeding and caring for your baby, you tend to not eat nearly as much as you did, and that also aids in weight loss. Before my son, i would eat when i was bored, now especially since he is walking, i hardly have time for anything. So breastfeeding is how i did it, and now im maintaining my weight by eating healthier and chasing after my son, thats my exercise. Also i drinks tons of water, my problem is i cant resist certain junk foods, so i just cant lose anymore weight, im just maintaining.