When you're in the middle of morning sickness, pregnancy exercise is the last thing you want to think about, but pregnancy exercise can help almost every aspect of this difficult and exciting nine months.

And with recent research showing more and more negative effects from the excessive weight gain many women experience at this time, pregnancy exercise becomes even more crucial.

However, not all workouts are appropriate when you are carrying. Intense workouts, excessive bouncing, and high temperatures are just a few of the things you need to watch out for.

To get good advice on what you can and can't do, turn to the experts. There's a whole variety of books on the subject - these are just a few of the titles available:

The Pregnancy Exercise Book : A Step-By-Step Program for Achieving Optimal Fitness Throughout the Trimesters
Pregnancy and Fitness: All You Need to Know to Exercise Safely and Effectively Throughout Pregnancy
Yoga for Pregnancy, Birth and Beyond
Pilates for Pregnancy: Toning Exercises for the Mother-to-be
Shaping Up, During and After Pregnancy

Following some of these recommendations will also help you both during and after delivery, so check them out to see which one will work best for you.