4Hohnadel DC, Kaplan LA. Beta - hCG methods in clinical Chemistry [ M ] . Edited by Pesce AJ, Kaplan LA. St. Louis, MO: The C. V. Mosby Company, 1987:110.
5Camzu R, Almog B, Levin Y, et al. Efficacy of methotrexate treatment in extrauterine pregnancies defined by stable us increasing human gonadotropin concentrations [J] . Fertil Steril, 2002, 77:761.
8Varras M, Polizos D, Kalamara CH, et al. Primary raptured ovarian pregnancy in a spontaneous conception cycle : a case report and review of the literature [J]. Clin Exp Obstet Gynecol,2002 ,29 : 1432 - 7.
9Gracia Cr,Barnhart KT.Diagnosing ectopic pregnancy: decision analysis comparing six strategies[].Obstetrics and Gynecology.2001
10Mol BW,Van der Veen F.Role of transvaginal ultrasonography in the diagnosis of ectopic pregnancy[].Fertility and Sterility.1998