N.R.
I was quite overweight, but healthy, when I got pregnant. I ate very well and continued to exercise and stay active. I never had problems with gestational diabetes or pre-eclampsia or any of those potential dangers. I only gained 17 pounds and it was all baby. The rest of my body shrank actually! They say that the more you weigh initially, the less you need to gain when pregnant. While, if you are underweight, you need to gain more. I had a healthy, albeit small (5lbs9oz) baby boy and lost the weight within two weeks of delivery. If you are worried about excess weight and pregnancy there is a wonderful book called "Big, Beautiful & Pregnant" by Cornelia Van Der Ziel. It has wonderful advice of how to get through a pregnancy healthfully and things to watch out for. The regular pregnancy books I found to be just plain scary, while this was comforting.