3CUNNINGHAM FG, MACDONALD PC, GAND NF, et al. In: Williams Obstetrics, 20^th ed [ M ]. Staford,CT: Appleton & Lange, 1997.
4USHAKOV FB, ELCHALAL U, ACEMAN PJ, et al.Cervical pregmaney: past and future [J]. Obstet Gynecol Surv, 1997, 52: 45- 59.
5HUNG TH, JENG C J, YANG YC, et al. Treatment of cervical pregnancy with methotrexate [ J ]. Int J Gynecol Obstel, 1996, 53: 243-247.
6HONEY L, LEADER A, CLAMAN P, et al. Human artery embolization - a successful treatment to control bleeding cervical pregnancy with a simultaneous intrauter-ine gestation [J]. Human Reproduction, 1999, 14:1553.
7GINSBURG ES, FRATES MC, REIN MS, et al. Early diagnosis and treatment of cervical pregnancy in an in vitro fertilization program [J]. Fertil Steril, 1994, 61: 966.
8TIMOR- TRITSCH IE, MONTEAGUDO A, MANDEVILLE EO, et al. Succesful management of viable cervical pregnancy by local injection of methotrexate guided by transvaginal uhrasonography [J]. Am J Obstet Gynecol,1994, 170: 737- 739.
9ROUSSIS P, BALL RH, FLEISCHER AC, et al. Cervical pregnancy: a case report [J]. J Report Med,1992, 37: 479-481.
10ROSENBERG RD, WILLIAMSON MR. Cervical ectopic pregnancy: avoiding pitfalls in the uhrasonographic dianosis [J]. J Ultrasound Med, 1992, 11 : 365 - 367.