Kommuri, Hima Bindu, and Valsa Diana G. “Umbilical True Knot: A Case Study”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 7, no. 7 (June 27, 2018): 2956–2958. Accessed November 14, 2025. https://www.ijrcog.org/index.php/ijrcog/article/view/4910.