Shweta, ., and A. Khanna. “Neural Tube Defect in Pregnancy With Hyperhomocysteinemia: A Case Report”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 3, no. 1, Dec. 2016, pp. 266-7, https://www.ijrcog.org/index.php/ijrcog/article/view/842.