Yadav, S. T., S. Kaur, and S. Goyal. “Primary Ovarian Pregnancy a Rare Clinical Entity: A Case Report”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 2, no. 3, Dec. 2016, pp. 444-6, https://www.ijrcog.org/index.php/ijrcog/article/view/142.