From thisarticle, I also found out that it is possible to achieve pregnancy while suffering from an eating disorder. This is mostly true for women who are bulimic, in part, because they are able to have a healthy body weight during their bouts with their disease.

From the article, here are some of the risks of being pregnant while having an eating disorder:

Getting pregnant while suffering from an eating disorder increases the risk of:

Gestational diabetes
Preeclampsia
Labor complications
Needing a c-section
Postpartum Depression (bulimics are especially vulnerable to this)
Infant death within the first month after birth
Baby being born with a low birth weight
Jaundice
Low APGAR scores
Low amniotic fluid
Placental separation
Birth defects, especially blindness and mental retardation

Achievement of pregnancy after treatment of an eating disorder falls into the 70-80% range. Treatment of the disease does not exclude the possiblity of relapse.

Getting Pregnant
As many as 75 to 80% of women will conceive after undergoing successful treatment and management of an eating disorder. For some women, getting pregnant is exactly what they need to help them completely overcome their disorder. For others, though, pregnancy can cause a relapse. Bulimics are especially vulnerable to relapsing during the postpartum period. However, just because the eating disorder is being treated does not mean that all the associated risks in pregnancy will disappear.
A recent Danish study showed that the effects of an eating disorder can be present in the body years after receiving treatment. Investigator’s found that a woman’s chances of having a high-risk pregnancy are the same for those women treated right before conceiving as they are for those treated 8 years prior to getting pregnant.

For women suffering from any type of eating disorder, it is best to delay pregnanct until the disorder is under control with treatment.