3Rand L,Norwitz ER. Current controversies in cervical cerclage. Seminars in perinatology, 2003,27(1):73~85.
4金山尚裕.颈管无力症の最近の考え方[J].临妇产,2002,56(7):840-843.
5Lee KY, Jun HA, Kim HB, et al. Interleukin-6, but not relaxin, predicts outcome of rescue cerclage in women with cervical incompetence. Am J Obstet Gynecol, 2004,191(3):784~789.
6ACOG criteria set. Cervical cerclage, number 17. Int J Gynecol Obstet 1997, 56(2):211.