Naila Tamkeen, Ghazala Wahid, Mehreen Samad, Nadia Khattak, Adnan Khan and Mahnoor Rehman Khan (2021) “Reference Values of Umbilical Artery Doppler Indices in Healthy Uncomplicated Pregnancy from 18-40 Week Gestation ”, Journal of Saidu Medical College, 11(2), pp. 63–67. doi: 10.52206/jsmc.2021.11.2.63-67.