• 1
    Shaw JL, Dey SK, Critchley HO, Horne AW. Current knowledge of the aetiology of human tubal ectopic pregnancy. Hum Reprod Update 2010; 16: 432444.
  • 2
    Barnhart KT, Katz I, Hummel A, Gracia CR. Presumed diagnosis of ectopic pregnancy. Obstet Gynecol 2002; 100: 505510.
  • 3
    Morin L, Van den Hof MC. Ultrasound evaluation of first trimester pregnancy complications. J Obstet Gynaecol Can 2005; 27: 581591.
  • 4
    Morelli SS, Keegan DA, Krey LC, Katz J, Liu M, Noyes N. Early serum interleukin-8 evaluation may prove useful in localizing abnormally implanted human gestations after in vitro fertilization. Fertil Steril 2008; 90: 20682072.
  • 5
    Soriano D, Hugol D, Quang NT, Darai E. Serum concentrations of interleukin-2R (IL-2R), IL-6, IL-8, and tumor necrosis factor alpha in patients with ectopic pregnancy. Fertil Steril 2003; 79: 975980.
  • 6
    Mueller MD, Raio L, Spoerri S, Ghezzi F, Dreher E, Bersinger NA. Novel placental and nonplacental serum markers in ectopic versus normal intrauterine pregnancy. Fertil Steril 2004; 81: 11061111.
  • 7
    Daponte A, Pournaras S, Zintzaras E et al. The value of a single combined measurement of VEGF, glycodelin, progesterone, PAPP-A, HPL and LIF for differentiating between ectopic and abnormal intrauterine pregnancy. Hum Reprod 2005; 20: 31633166.
  • 8
    Florio P, Severi FM, Bocchi C et al. Single serum activin a testing to predict ectopic pregnancy. J Clin Endocrinol Metab 2007; 92: 17481753.
  • 9
    Horne AW, van den Driesche S, King AE et al. Endometrial inhibin/activin beta-B subunit expression is related to decidualization and is reduced in tubal ectopic pregnancy. J Clin Endocrinol Metab 2008; 93: 23752382.
  • 10
    Dart R, Dart L, Segal M, Page C, Brancato J. The ability of a single serum progesterone value to identify abnormal pregnancies in patients with beta-human chorionic gonadotropin values less than 1,000 mIU/mL. Acad Emerg Med 1998; 5: 304309.
  • 11
    Milwidsky A, Adoni A, Segal S, Palti Z. Chorionic gonadotropin and progesterone levels in ectopic pregnancy. Obstet Gynecol 1977; 50: 145147.
  • 12
    Mol BW, Lijmer JG, Ankum WM, van der Veen F, Bossuyt PM. The accuracy of single serum progesterone measurement in the diagnosis of ectopic pregnancy: A meta-analysis. Hum Reprod 1998; 13: 32203227.
  • 13
    Grosskinsky CM, Hage ML, Tyrey L, Christakos AC, Hughes CL. hCG, progesterone, alpha-fetoprotein, and estradiol in the identification of ectopic pregnancy. Obstet Gynecol 1993; 81: 705709.
  • 14
    Atri M, Valenti DA, Bret PM, Gillett P. Effect of transvaginal sonography on the use of invasive procedures for evaluating patients with a clinical diagnosis of ectopic pregnancy. J Clin Ultrasound 2003; 31: 18.
  • 15
    Dart R, Howard K. Subclassification of indeterminate pelvic ultrasonograms: Stratifying the risk of ectopic pregnancy. Acad Emerg Med 1998; 5: 313319.
  • 16
    Kadar N, Romero R. Further observations on serial human chorionic gonadotropin patterns in ectopic pregnancies and spontaneous abortions. Fertil Steril 1998; 50: 367370.
  • 17
    Johnson MR, Riddle AF, Irvine R et al. Corpus luteum failure in ectopic pregnancy. Hum Reprod 1993; 8: 14911495.
  • 18
    Stovall TG, Ling FW, Carson SA, Buster JE. Serum progesterone and uterine curettage in differential diagnosis of ectopic pregnancy. Fertil Steril 1992; 57: 456457.
  • 19
    Sowter MC, Farquhar CM, Gudex G. An economic evaluation of single dose systemic methotrexate and laparoscopic surgery for the treatment of unruptured ectopic pregnancy. BJOG 2001; 108: 204212.
  • 20
    Potter MB, Lepine LA, Jamieson DJ. Predictors of success with methotrexate treatment of tubal ectopic pregnancy at Grady Memorial Hospital. Am J Obstet Gynecol 2003; 188: 11921194.
  • 21
    Tawfiq A, Agameya AF, Claman P. Predictors of treatment failure for ectopic pregnancy treated with single-dose methotrexate. Fertil Steril 2000; 74: 877880.
  • 22
    Gamzu R, Almog B, Levin Y et al. Efficacy of methotrexate treatment in extrauterine pregnancies defined by stable or increasing human chorionic gonadotropin concentrations. Fertil Steril 2002; 77: 761765.