Gupta, U., and U. Agrawal. “Uterine Artery Doppler Analysis at 11-14 Weeks As a Predictor of Intra-Uterine Growth Restriction”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 10, no. 11, Oct. 2021, pp. 4131-5, doi:10.18203/2320-1770.ijrcog20214320.