Today "Good Morning America" shared the story of Beth Jones, who struggled with an eating disorder that continued during her three pregnancies. Jones, who is featured on a special program airing tonight on the Discovery Health called "'I'm Pregnant and ... I Have an Eating Disorder," has spent much of her life obsessed with diet and exercise. While Jones gave birth to healthy babies, "GMA" medical contributor Dr. Marie Savard says having an eating disorder during pregnancy can pose serious risks. "Most women with eating disorders have a difficult time getting pregnant, and when they do there are risks," Savard said.

But there is also good news. Savard says many women with eating disorders do actually get better during pregnancy. They often feel they are eating for the good of the baby and that concern outweighs the other issues that lead to the disordered eating. But others get depressed over the changes in their body shape and image, and may actually have more disordered eating. Many fall somewhere in between.