Ade-Ojo IP, Ipinnimo OM. Menstruating primary umbilicus cutaneous endometriosis: A case report and review of literature. Clin J Obstet Gynecol [Internet]. 2021 May 5 [cited 2026 Mar. 11];4(2):069-71. Available from: https://www.obstetricgynecoljournal.com/cjog/article/view/cjog-aid1090