Eating disorders are symptomatic of many things, one of which is celiac disease/syndrome. There are two types, both caused by genes. With the first type the person will have had celiac disease from infancy. Sometimes it's the cause of "failure to thrive" and can be deadly. The second type is "intermittent" ~ it can start up in the elderly (over 60) or youth, or anyone in between who has the genes for it AND has had abdominal surgery of any kind.
Intermittent celiac disease is fairly rare ~ may occur in 1 out of a 1000 people, and an individual may be asymptomatic all his or her life.
Abortion probably triggers it, but first you have to test to see if the individual has intermitent celiac disease.