Songsathaporn, L., Puttanavijarn, L. and Sudjai, D. (2021) “Normative Values of Uterine Artery Doppler Pulsatility Index using Transvaginal Ultrasound in Women between 18-24+6 Weeks of Gestation at Rajavithi Hospital”, Thai Journal of Obstetrics and Gynaecology. Bangkok, Thailand, 29(4), pp. 227–235. doi: 10.14456/tjog.2021.27.