Sharma, Shikha, Anu Bala Chandel, Anupam Sharma, and Aditi Ranaut. “Spontaneous Heterotopic Pregnancy: A Case Report”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 11, no. 1 (December 28, 2021): 262–264. Accessed October 26, 2025. https://www.ijrcog.org/index.php/ijrcog/article/view/11105.