M. S., Shreya, and Savitha C. “Significance of Transvaginal Sonographic Assessment of Cervical Length before Induction of Labour”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 7, no. 9 (August 27, 2018): 3702–3706. Accessed October 12, 2025. https://www.ijrcog.org/index.php/ijrcog/article/view/5226.