ABSTRACT
It is not known why some women acquire this disease. Its persistence and spread are dependent on the cyclical secretion of steroid hormones from the ovaries,
Endometriosis is most simply defined as the presence of endometrial surface epithelium and/or the presence of endometrial glands and stroma outside the lining of the uterine cavity. One of the first definitive descriptions of endometriosis as a specific clinical condition was by Sampson in 1921.
