Ovulation suppression for endometriosis.

Although the etiology of endometriosis is unknown, several theories exist, the most popular of which is retrograde menstruation. As endometriosis can only be diagnosed by laparoscopy, neither the incidence (annual occurrence) nor the prevalence (proportion of the population affected) of endometriosis is known. The association between endometriosis and infertility isn't clear in Stage I (minimal) and Stage II (mild) endometriosis. Endometriosis appears to be an estrogen dependent condition. At the time of menopause, most endometriosis becomes quiescent. This hormonal dependency prompted researchers to seek agents which would suppress ovarian activity.