Lindsay Brin, author of How to Exercise when Expecting and fitness expert for Fit Pregnancy and Mom & Baby magazines will guide you through safe and effective workouts designed specifically for each stage of pregnancy. As you progress in your pregnancy your endurance level will change, so your workouts need to match the challenge! This 4-DVD workout Set includes 1st Trimester, 2nd Trimester, 3rd Trimester and PostNatal Boot Camp.