M., C., A. G. S., S. Suresh, and S. C. “A Prospective Study of Role of Doppler in Pregnancy and the Perinatal Outcome”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 9, no. 2, Jan. 2020, pp. 692-5, doi:10.18203/2320-1770.ijrcog20200360.