The Cause of Endometriosis -- Endometrial Implantation Theory

 

In 1860, Von Rokitansky described endometriosis for the first time, but its pathogenesis is still an unsolved question. In 1921, Sampson proposed the theory of the backflow of menstrual blood and endometrial implantation theory, which is generally accepted as the leading theory.

 

However, the backflow of menstrual blood is very common in women of childbearing age, with an incidence of about 90%. It is almost a physiological phenomenon, but only 10% - 15% of people have endometriosis. Moreover, Sampson's implantation theory can not explain the distant metastasis of endometriosis, so this theory Questioned.

 

The implantation theory is also called the Sampson theory. In 1921, it was put forward that the active endometrium can be planted in the ovarian or rectocele, and it can be deposited by gravity.

 

The menstrual blood of normal women contains not only blood but also shed endometrial fragments. When women are menstruating, the menstrual blood can pour into the fallopian tube from the uterine cavity and enter the pelvic cavity through the fimbria end.