Iatrogenic endometriosis: substantiation of the Sampson hypothesis.

A 31-year-old woman developed unilateral endometriosis at the site of ovarian implantation to a uterine window. This complication of the Estes procedure resembles the experimental endometriosis induced in rhesus monkeys by causing intraabdominal menstruation. This adds support to the Sampson hypothesis of endometriosis development.