Nafees, Muhammad, Muhammad Imran Ibrahim, and Muhammad Hamid Akram. 2014. “SENSITIVITY AND SPECIFICITY OF PULSATILITY INDEX UMBILICAL ARTERY AND MIDDLE CEREBRAL ARTERY IN DETECTING INTRA UTERINE GROWTH RESTRICTION: Pulsatility Index”. Pakistan Armed Forces Medical Journal 64 (1): 161-66. https://pafmj.org/PAFMJ/article/view/611.