Wataganara T, Talungjit P, Phithakwatchara N, Swasdimongkol S. Three Dimensional Sonographic Appearances of Chinese Ring Intrauterine Device:. Siriraj Med J [internet]. 2008 Nov. 1 [cited 2026 Sep. 18];60(6):360-3. available from: https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/246512