1Barnhart KT, Sinhan H,Kamelle SA. Diagnostic accuracy of ultrasound above and below the beta hCG disciriminatory zone[J]. Obstet Gynecol,1999.94 (4):583.
3[1]Mccord ML, Muran D, Buster JE, et al. Single serum progesterone as a screen for ectopic pregnancy:exchanging specificity and sensitivity to obtain optimal test performance [J ]. FertilSteril, 1996,66(4) :513 - 516.
4[2]Dart R, Dart L, Segal M, et al. The ability of a single progesterone value to identity abnormal pregnancies in patients with beta-human chorionic gonadotropin values less than 1000mIU/ml[J]. Acad Emerg Med, 1998,5(4) :304 - 309.
5[3]Valley VT, Mateer JR, Aimam EJ, et al. Serun progesterone and endovaginal by emergency physicians in the evaluation of ectopic pregnancy [J ]. Acad Emerg Med, 1998, 5 (4): 309 -313.
6[4]Banerjee S, Aslam N, Woelfer B, et al. Expectant management of early orancies of unknown location:a prospective evaluation of methods to predict spontaneous resolution of pregnancy[J]. Br J Obstet Gynecol,2001,108(2): 158 - 163.
7[5]Alexander JM, Rouse DJ, Varner E, et al. Treatment of the small unruptured ectopic pregnancy:A Cost Analysis Of Methotrexate Versus Laparoscopy [ J ]. Obstet Gynecol, 1996,88 ( 1 ):123 -127.
8[6]Wikinson C, Petrucco O, Pachulicz M, et al. Interstitial ectopic pregnancy mangement with laparoscopically guided local methotrexate infiltration[J ]. Aust N Z J Obstet Gynecol, 1998,38(4) :434 - 437.