Sivasambu, G. D., S. B. Kempaiah, and U. Thukral. “Risk Factors for Post-Partum Hemorrhage in Patients Who Underwent Operative Vaginal Delivery in a Tertiary Care Center”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 10, no. 11, Oct. 2021, pp. 4085-9, doi:10.18203/2320-1770.ijrcog20214066.