Buathum, Nattaya, Peerapun Punpuckdeekoon, and Nutthaphon Imsom-somboon. “The Reliability of Transabdominal Cervical Length Measurement Compared with Transvaginal Measurement at 16-24 Weeks of Gestation”. Thai Journal of Obstetrics and Gynaecology 27, no. 3 (July 1, 2019): 165–173. accessed September 28, 2026. https://he02.tci-thaijo.org/index.php/tjog/article/view/115977.