B. P. THANGAPPAH, R.; SAMPSON, U.; AZAD, A.; ARUMUGAM, R.; ANAND, S.; KARUNAKARAN, P. A study to evaluate serum 25-hydroxy vitamin D3 and calcium levels in maternal and cord blood and their effect on pregnancy outcome. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 8, n. 4, p. 1575–1582, 2019. DOI: 10.18203/2320-1770.ijrcog20191221. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/6201. Acesso em: 13 oct. 2025.