"The idea of an adolescent unmarried woman is a completely new idea in the Muslim world," she writes.

Although it has become synonymous with eating disorders, anorexia is relatively rare, affecting less than 1 percent of adolescent women.

"Ten years ago the literature was saying that it was only of a concern in adolescent women and older women."

They are the most common breast tumor in adolescent women.

The annual number of births per 1,000 adolescent women aged 15 to 19 has declined from 49.9 in 1990 to 17.9 in 2007.

The condition largely affects young adolescent women, with between 15 and 19 years old making up 40% of all cases.

They said the company had not shown that it could be used safely by "young adolescent women" without a doctor's supervision.

It may be the first time that an adolescent woman is alone with an older man.

Adolescent men report lower levels of religious participation or association with a particular faith than adolescent women.