^ 1.01.1American College of Obstetricians and, Gynecologists. ACOG Practice Bulletin No.142: Cerclage for the management of cervical insufficiency.. Obstetrics and gynecology. Feb 2014, 123 (2 Pt 1): 372–9. PMID 24451674. doi:10.1097/01.AOG.0000443276.68274.cc.
^陈仁彬 (编). 实用超声诊断学. 北京:中国医药科技出版社. 1997年5月: 494. ISBN 7-5067-1606-2.使用|accessdate=需要含有|url= (帮助)
^Macdonald, R; Smith, P; Vyas, S. Cervical incompetence: the use of transvaginal sonography to provide an objective diagnosis.. Ultrasound in Obstetrics & Gynecology. Sep 2001, 18 (3): 211–6. PMID 11555448. doi:10.1046/j.1469-0705.2001.00459.x.
^陈必良 (编). 机器人妇产科手术学. 西安:西安交通大学出版社. 2015年2月: 252. ISBN 978-7-5605-6429-6.使用|accessdate=需要含有|url= (帮助)
^Armarnik, S; Sheiner, E; Piura, B; Meirovitz, M; Zlotnik, A; Levy, A. Obstetric outcome following cervical conization.. Archives of gynecology and obstetrics. April 2011, 283 (4): 765–9. PMID 21327802. doi:10.1007/s00404-011-1848-3.
^Zeisler, H; Joura, EA; Bancher-Todesca, D; Hanzal, E; Gitsch, G. Prophylactic cerclage in pregnancy. Effect in women with a history of conization.. The Journal of reproductive medicine. July 1997, 42 (7): 390–2. PMID 9252928.
^Abdel-Aleem, H; Shaaban, OM; Abdel-Aleem, MA. Cervical pessary for preventing preterm birth.. The Cochrane database of systematic reviews. May 31, 2013, 5: CD007873. PMID 23728668. doi:10.1002/14651858.CD007873.pub3.