- a condition in which cells, normally lining the inside of the uterus, begin to grow outside. The internal mucous membrane of the uterus is called endometrium - hence the name.
Most often, "migrant cells" are embedded in the tissues of the ovaries, uterus, and fallopian tubes, sometimes they also enter other organs of the small pelvis, for example, the intestines or the bladder. But even by “changing residence”, the cells continue to obey the hormones that control the female cycle. During menstruation, migrated cells are rejected in the same way as normal endometrial cells, which remain in place.
There is one important difference: endometriosis cells cannot leave the body with menstrual blood.
Sometimes rejected cells cause small bleeding inside the pelvis. In the place where the blood got, inflammation occurs, with which the body successfully copes. As a result, the woman either does not feel anything at all, or experiences mild abdominal pain, which quickly passes. But if the cells are embedded in the ovarian tissue, cysts can begin to grow on the organ - formations from the connective tissue filled with menstrual blood.
Cysts can grow more than six centimeters in length, cause severe pain and cause infertility.