Nath, Jayati, Bhattacharjee A. K., and Talukdar R. K. “A Clinical Study on Ultrasonographic Measurement of Cervical Length at 18-24 Weeks of Gestation and Pregnancy Outcome”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 5, no. 4 (December 27, 2016): 1088–1092. Accessed December 4, 2025. https://www.ijrcog.org/index.php/ijrcog/article/view/879.