Having a baby is a beautiful -- and life-altering -- event. In addition to the joy and excitement you'll feel at the birth of your new little one, pregnancy and giving birth to your baby will also transform your body both in ways you can see (hello, stretch marks) and can't see, as your muscles and joints have undergone tremendous stress over the past 10 months or so. But have no fear. With some patience and exercise, you can get back into shape. Just remember to be kind to yourself along the way. You didn't gain the weight overnight, so you're not going to lose it overnight, either.