Renukesh, S. M., Rai, L., & Hebbar, S. (2017). How important is serum β-hCG in the management of ectopic pregnancy?. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, 4(2), 360–365. Retrieved from https://www.ijrcog.org/index.php/ijrcog/article/view/1881