Mahapatro, A., K. Shankar, and T. Varma. “Heterotopic Triplet Gestation in Natural Conception Following an IVF Cycle: A Rare Case Report”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 5, no. 2, Dec. 2016, pp. 576-8, doi:10.18203/2320-1770.ijrcog20160418.