Jain, Nitin Kumar, and Shabana Sultan. “Study of Heart Disease in Pregnancy and Its Effect on Maternal Outcome”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 8, no. 8 (July 26, 2019): 3031–3036. Accessed December 4, 2025. https://www.ijrcog.org/index.php/ijrcog/article/view/6900.