Study Population: The case population includes women who have consented to the Data Registry (H16-00264) and who are newly or re-referred to the BC Women's Centre for Pelvic Pain and Endometriosis, and who have regardless of the severity of deep dyspareunia, either: 1) previous surgical diagnosis of endometriosis or 2) current ovarian endometrioma cyst or 3) current endometriosis nodule.