Pahuja, Nikita, Nidhi Chauhan, and Vinita Kalra. 2017. “Vitamin D Levels in Pregnant Women in Uttarakhand, India”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 7 (1):169-72. https://doi.org/10.18203/2320-1770.ijrcog20175840.