Sah, D. K., F. Deeba, and S. B. Chowdhury. “The Role of Maternal Echocardiography and Uterine Artery Doppler at 11-14 Weeks in the Prediction of Pre-Eclampsia in Nulliparous Women”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 11, no. 1, Dec. 2021, pp. 24-30, doi:10.18203/2320-1770.ijrcog20215072.