Mathew, Rachel, Vinitha Wills, and Jacob Abraham. “Maternal Determinants and Fetal Outcome of Twin Pregnancy: A Five-Year Survey”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 6, no. 6 (May 25, 2017): 2459–2465. Accessed October 4, 2025. https://www.ijrcog.org/index.php/ijrcog/article/view/2661.