Background: Endometriosis is a common and frequently occurring disease. The effect of its treatment is often unsatisfying because the occurrence and progression of ectopic endometrium are far from being completely understood. We conclude that it would be related to various pathegenisis by its various manifestation. Endometriosis is considered as a kind of hormone-dependent disease. Studies have demonstrated that the occurrence and development of endometriosis have hormone dependence. The expression of hormo...