Naik, Y.M., S., S., Ashok, K. and Keerti 2026. An observational study on the magnitude of vitamin D levels in first trimester of pregnancy and the outcomes. International Journal of Reproduction, Contraception, Obstetrics and Gynecology. 15, 7 (Jun. 2026), 2531–2539. DOI:https://doi.org/10.18203/2320-1770.ijrcog20262099.