Rathod, Setu, Sunil Kumar Samal, and Seetesh Ghose. 2017. “Pregnancy of Unknown Location (PUL): A Case Report and Review of Literature”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 3 (3):808-11. https://www.ijrcog.org/index.php/ijrcog/article/view/1118.