Neravi, Asha, and Voorkara Udayashree. “Role of Uterine Artery Doppler at 12 to 16 Weeks of Gestation in Prediction of Pre-Eclampsia an Observational Study”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 7, no. 8 (July 26, 2018): 3162–3167. Accessed October 28, 2025. https://www.ijrcog.org/index.php/ijrcog/article/view/5011.