Singh, Arvind Kumar, and Shazia Khan. “Heterotopic Pregnancy: Case Report of a Successful First Trimester Metacyesis Management and a Viable Third Trimester Outcome”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 8, no. 1 (December 26, 2018): 332–334. Accessed October 27, 2025. https://www.ijrcog.org/index.php/ijrcog/article/view/5840.