Bhalla, Shivali, Seema Grover Bhatti, and Shalini Devgan. “Obstetric and Perinatal Outcome of Twin Pregnancy: A Prospective Study in a Tertiary Care Hospital in North India”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 7, no. 6 (May 26, 2018): 2455–2461. Accessed December 29, 2025. https://www.ijrcog.org/index.php/ijrcog/article/view/4867.