Gupta, Neena, Seema Dwivedi, Sangeeta Arya, and Shefali Pande. “Heterotopic Pregnancy: A Catastrophic Event”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 2, no. 3 (December 10, 2016): 467–469. Accessed October 14, 2025. https://www.ijrcog.org/index.php/ijrcog/article/view/121.