H. N., Poornima, Nayanashree V., Premalatha H. L., and Nirmala Doreswamy. “Correlation Between Vitamin D Levels in Third Trimester and Postpartum Hemorrhage”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 13, no. 2 (January 29, 2024): 355–357. Accessed October 2, 2025. https://www.ijrcog.org/index.php/ijrcog/article/view/13754.