A new study by University of North Carolina at Chapel¹ Hill and Norwegian researchers has found that women with anorexia² nervosa（神经性厌食） are much more likely to have both unplanned pregnancies³ and induced（感应的，诱发型） abortions⁴ than women who don't have the serious eating disorder⁵. These results may be driven by a mistaken belief among women with anorexia that they can't get pregnant because they are either not having menstrual periods（月经期）at all or are having irregular periods, said Cynthia M. Bulik, PhD, the study's lead author and director of the UNC Eating Disorders⁶ Program.

"Anorexia is not a good contraceptive（避孕剂） ," Bulik said. "Just because you're not menstruating（月经来潮） , or because you're menstruating irregularly, doesn't mean you're not at risk for becoming pregnant."

Physicians and other health care providers need to be aware of this as well, Bulik said. Doctors who treat women and adolescent girls, in particular, "need to make sure that they have the conversation about sexuality and contraception as clearly with patients with anorexia as they do with all other girls and women."

In addition, providers who take care of pregnant women need to know when their patients have an eating disorder in order to provide appropriate care. Screening for eating disorders during prenatal visits would be an excellent first step, Bulik said.

In the study, published in the November 2010 issue of the journal Obstetrics & Gynecology, Bulik and study co-authors analyzed⁷ data collected from 62,060 women as part of the Norwegian Mother and Child Cohort Study. There were 62 women in this sample who reported having anorexia nervosa.

The differences between women with anorexia and women with no eating disorder were striking. The average age of the mothers at delivery was 26.2 years in women with anorexia, compared with 29.9 years in the referent group of women without eating disorders. Fifty percent of women with anorexia reported unplanned pregnancies, compared with 18.9 percent, while 24.2 percent of women with anorexia reported having induced abortions in the past, compared to 14.6 percent.