Tyagi, Vatika, Mamta Tyagi, Smriti Gupta, Esha Khanuja, and Yamini Varma. “Maternal Vitamin D Levels in Hypertensive Disorders of Pregnancy”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 9, no. 12 (November 26, 2020): 4870–4873. Accessed October 13, 2025. https://www.ijrcog.org/index.php/ijrcog/article/view/9360.