Songsathaporn L, Puttanavijarn L, Sudjai D. Normative Values of Uterine Artery Doppler Pulsatility Index using Transvaginal Ultrasound in Women between 18-24+6 Weeks of Gestation at Rajavithi Hospital. Thai J Obstet Gynaecol [internet]. 2021 Jul. 1 [cited 2026 Sep. 25];29(4):227-35. available from: https://he02.tci-thaijo.org/index.php/tjog/article/view/206521