3Hager WD. Eschenbsch DA, Spence MR, et al, Criteria for diagnosis and grading of salpingtis. Obstet Gynecol, 1983,61(1):113~114.
4Lund CO, Milas L, Bengsgeard N, et al. Persistent ectopic pregnancy after linner salpingotomy: a non-predictable complication to conservative surgery for tubal gestation [ J ]. Acta Obstet Gynecol Scan, 2002,81 (2) :1053-1059.
5Spandorfer SD, Sawin SW, Benjamiol, et al. Postoperative day serum human chorionic gnnadotwpin level as a predictor of persistent ectopic pregnancy after conservative surgical management[J]. Fertil Steril, 1997,68(6) :430-434.