Sunsaneevithayakul, Prasert, Teera Siwadune, Dittakarn Boriboonhirunsarn, Vittaya Titapant, and Anuwat Sutanthavibul. “Reference Centile Charts for Fetal Umbilical Artery Doppler Velocimetry Waveform of Thai Fetuses”. Thai Journal of Obstetrics and Gynaecology 12, no. 3 (July 1, 2000): 201–211. accessed September 28, 2026. https://he02.tci-thaijo.org/index.php/tjog/article/view/256789.