Sheth, Vishal S., Kanaklata D. Nakum, Mehul D. Patel, and Mayank R. Lunagariya. “Maternal Serum βhCG Level and Uterine Artery Doppler Studies As Predictors of Pregnancy Induced Hypertension and Intra Uterine Growth Restriction: A Prospective Study”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 8, no. 8 (July 26, 2019): 3357–3361. Accessed December 4, 2025. https://www.ijrcog.org/index.php/ijrcog/article/view/6939.