Arora, Renu, Nikky Punia, and Archana Kumari. “Fetal Colon Diameter As a Tool for Estimating Gestational Age in Advanced Pregnancy in North Indian Population: A Pilot Study”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 5, no. 5 (January 4, 2017): 1577–1581. Accessed October 9, 2025. https://www.ijrcog.org/index.php/ijrcog/article/view/1156.