Can Fam Physician. 1979 May;25:617-8.
Accidental pregnancies with intrauterine devices may in part be attributed to inappropriate patient selection, lack of insertion expertise by physicians, and downward migration of IUDs from initial placement position. Available research on these factors is reviewed and a clinical protocol using ultrasound is proposed to detect and correct malpositioned devices.
宫内节育器导致的意外妊娠部分归因于患者选择不当、医生放置技术缺乏以及宫内节育器初始位置下移。本文回顾了这些因素的相关研究,并提出了一种使用超声的临床方案,以检测和纠正位置不当的宫内节育器。