6ACOG practice bullet. Medical management of tubal pregnancy [ J ]. Int J Gynecol Obstet, 1999,65:99 -100.
7The Practice Committee of the American Society for Reproductive Medicine. Medical treatment of ectopic pregnancy [ J ]. Fertil Steril, 2006,86(4 Suppl) :S89-98.
8Menon S, Colins J, Barnhart KT. Establishing a human chorionic gonadotropin cutoff to guide methotrexate treatment of ectopic pregnancy: u systematic review [ J ]. Fertil Steril, 2007,87:481- 484.
9Gamzu B, Almog B, Levin Y, et al. Efficacy of methotrexate treatment in extrauterine pregnancies defined by stable or increasing human chorionic gonadotropin concentratJons[J]. Fertil Steril,2003 ,77 :761-764.
10Snyder JA, Haymond S, Parvin CA, et al. Diagnostic considerations in the measurement of human ehorionie gonadotropin in aging women [ J ]. Clin Chem, 2005,51 : 1830-1835.
