SparkPeople doesn't currently have a program for pregnant women. I would suggest setting your current weight and goal weight to the same number. Then depending where you are in your pregnancy, you'll want to add 300 calories to the low and high end of that range in the second and third trimesters. That should give you the additional calories you need as your baby grows.
"You may have a fresh start any moment you choose, for this thing that we call "failure" is not the falling down but the staying down." Mary Pickford