Kaundal, Asmita, Usha Gupta, and Jayashree Bhattcharjee. “Role of Pregnancy Associated Plasma Protein-A and Doppler Velocimetry in the Assessment of Fetomaternal Outcome in High Risk Pregnancy”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 8, no. 5 (April 29, 2019): 1981–1989. Accessed October 7, 2025. https://www.ijrcog.org/index.php/ijrcog/article/view/6388.