Pregnancy
According to some medical studies, the development of endometriosis starts in the fetal period. At the beginning of the pregnancy, there occurs misplacing of tissues, which then causes the hormones to lead to puberty. This approach of the cause of endometriosis is known as Mullerian theory.
Faulty lymphatic system
The fault in the lymphatic system might also lead to the endometrial cells’ transportation out of the uterus wall, thus leading to endometriosis disorder. The endometrial cells tend to consist of higher amounts of lymphatic nodes, leading to the impairment of lymph nodes present in ovaries and inside the uterus.