Kour, Harleen, Shashi Gupta, Swarn K. Gupta, Bawa Ram Bhagat, and Gagan Singh. “Vitamin D Status in Pregnant Women and Their Newborns in a Tertiary Care Hospital”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 7, no. 12 (November 26, 2018): 5071–5075. Accessed February 2, 2026. https://www.ijrcog.org/index.php/ijrcog/article/view/5722.