Garg, Shaveta, Tajinder Kaur, Ajayveer Singh Saran, and Monu Yadav. “A Study of Etiology and Outcome of Preterm Birth at a Tertiary Care Centre”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 6, no. 10 (September 23, 2017): 4488–4491. Accessed February 1, 2026. https://www.ijrcog.org/index.php/ijrcog/article/view/3446.