Varghese, Shiny, Gagandeep Kour, Kanika Manchanda, and Tapasya Dhar. 2017. “Abnormal Umbilical Artery Doppler in Third Trimester and Perinatal Outcome: A Retrospective Study”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 5 (7):2196-99. https://doi.org/10.18203/2320-1770.ijrcog20162092.