Chakraborty, M. K., S. Gainder, S. C. Saha, and R. Bagga. “A Novel Approach in Non-Surgical Management of Tubal Ectopic: Combination of Minimally Invasive Technique under Ultrasound Guidance With Systemic Methotrexate Based on Initial Beta-HCG Levels”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 10, no. 7, June 2021, pp. 2606-12, doi:10.18203/2320-1770.ijrcog20212331.