You Can Be Fit, Fabulous, and Pregnant: Samantha Harris's Secrets to a Fit Pregnancy

Months 1-3

Month 1: Exercising Restraint

We're having a baby! When my ob-gyn's nurse called to confirm it, I snuck out to the E! News parking lot and called my husband, Michael. We were both ecstatic.

It feels like the perfect time to start a family. But I know that life's about to change in a big way, starting with how I treat my body. I started dancing at age 7, and I love tough classes, like Cardio Core Ball at the nearby Equinox gym. My doc said to go for it but to wear a heart-rate monitor to make sure my heart doesn't beat more than 130 times per minute. I used to run up all 200 of the Santa Monica Stairs, and my heart rate would rise to 172 bpm; the other day I had to stop at 50 stairs and walk.

Month 2: A New Way of Eating

Knock on wood -- I haven't been tired or had morning sickness. A big reason is my new breakfast of four or five boiled or scrambled egg whites with OJ and fruit or yogurt. For lunch, it's salad with grilled chicken; for dinner, fish with sliced vegetables. For dessert, I love Skinny Cow Cookies 'N Cream ice cream sandwiches. The only thing I desperately miss: raw-fish sushi. I've gained a few pounds this month -- so long, skinny jeans! I've retired my Levi's Premium Slim Fits, at least for a while.

Month 3: Beating Stress

On the second week of last season's Dancing with the Stars, I wore a purple satin dress that showed a little belly pooch, and the Internet started buzzing with rumors. I made an announcement on the show a few weeks later. Heather Mills told me she's going to send over a book that she used to help get her newborn to sleep. At a party, Naomi Watts said that high-waisted dresses are the best thing to wear during pregnancy, so I bought a few cute ones. I'm now up about five pounds and have to use a rubber band to keep even my "big" jeans closed. I've been so busy with work that I make it to the gym only once or twice a week. But Michael and I have been taking walks around our neighborhood to de-stress.