Hasabe, R.A., Tripathi, N.S. and Kesarkodi, P. 2022. Menstruating umbilicus: secondary subcutaneous umbilical endometriosis: a rare case report. International Journal of Reproduction, Contraception, Obstetrics and Gynecology. 11, 6 (May 2022), 1814–1817. DOI:https://doi.org/10.18203/2320-1770.ijrcog20221469.