Chattrakoonphong S, Kongsomboon K, Hanprasertpong T. Rate of Re-dating after Determination of Gestational Age using Ultrasonography in Clinically Reliable and Clinically Non-reliable Pregnant Women during the First Trimester . Thai J Obstet Gynaecol [internet]. 2025 Mar. 11 [cited 2026 Sep. 24];33(2):161-70. available from: https://he02.tci-thaijo.org/index.php/tjog/article/view/270376