• 1
    Martin JA, Hamilton BE, Sutton PD, Ventura SJ, Menacker F, Kirmeyer S, et al. Births: final data from 2006. Natl Vital Stat Rep 2009;57:7. Available at Last accessed 26 August 2010.
  • 2
    Embrey MP, Mollison BC. The unfavorable cervix and the induction of labor using a cervical balloon. J Obstet Gynaecol Br Commonw 1967;74:448.
  • 3
    Gelber S, Sciscone A. Mechanical methods of cervical ripening and labor induction. Clin Obstet Gynecol 2006;49:64257.
  • 4
    Kelly AJ, Kavanagh J, Thomas J. Vaginal prostaglandin (PGE2 and PGF2a) for induction of labour at term. Cochrane Database Syst Rev 2003;4:CD003101.
  • 5
    Hofmeyr GJ, Gülmezoglu AM. Vaginal misoprostol for cervical ripening and induction of labor. Cochrane Database Syst Rev 2003;1:CD000941.
  • 6
    Boulvain M, Kelly A, Lohse C, Stan C, Irion O. Mechanical methods for induction of labor. Cochrane Database Syst Rev 2001;4:CD001233.
  • 7
    Schulz KF, Chalmers I, Hayes RJ, Altman DG. Empirical evidence of bias. Dimensions of methodological quality associated with estimates of treatment effects in controlled trials. JAMA 1995;273:40812.
  • 8
    Higgins JPT, Thompson SG, Deeks JJ, Altman DG. Measuring inconsistency in meta-analyses. BMJ 2003;327:55760.
  • 9
    Sterne JA, Egger M. Funnel plots for detecting bias in meta-analysis: guidelines on choice of axis. J Clin Epidemiol 2001;54:104655.
  • 10
    Duval S, Tweedie R. Trim and fill: a simple funnel-plot based method of testing and adjusting for publication bias in meta-analysis. Biometrics 2000;56:45563.
  • 11
    Chung JH, Huang WH, Rumney PJ, Garite TJ, Nageotte MP. A prospective randomized controlled trial that compared misoprostol, Foley catheter, and combination misoprostol-Foley catheter for labor induction. Am J Obstet Gynecol 2003;189:10315.
  • 12
    Gelisen O, Caliskan E, Dilbaz S, Ozdas E, Dilbaz B, Ozdas E, et al. Induction of labor with three different techniques at 41 weeks of gestation or spontaneous follow-up until 42 weeks in women with definitely unfavorable cervical scores. Eur J Obstet Gynecol Reprod Biol 2005;120:1649.
  • 13
    Owolabi AT, Kuti O, Ogunlola IO. Randomised trial of intravaginal misoprostol and intracervical Foley catheter for cervical ripening and induction of labour. J Obstet Gynaecol 2005;25:5658.
  • 14
    Adeniji OA, Oladokun A, Olayemi O, Adeniji OI, Odukogbe AA, Ogunbode O, et al. Pre-induction cervical ripening: transcervical Foley catheter versus intravaginal misoprostol. J Obstet Gynaecol 2005;25:1349.
  • 15
    Kashanian M, Akbarian AR, Fekrat M. Cervical ripening and induction of labor with intravaginal misoprostol and Foley catheter cervical traction. Int J Gynaecol Obstet 2006;92:7980. Epub 2005 Oct 21.
  • 16
    Prager M, Eneroth-Grimfors E, Edlund M, Marions L. A randomised controlled trial of intravaginal dinoprostone, intravaginal misoprostol and transcervical balloon catheter for labour induction. BJOG 2008;115:144350. Epub 2008 Aug 19.
  • 17
    Sciscione AC, Nguyen L, Manley J, Pollock M, Maas B, Colmorgen G. A randomized comparison of transcervical Foley catheter to intravaginal misoprostol for preinduction cervical ripening. Obstet Gynecol 2001;97:6037.
  • 18
    Greybush M, Singleton C, Atlas RO, Balducci J, Rust OA. Preinduction cervical ripening techniques compared. J Reprod Med 2001;46:117.
  • 19
    Moraes Filho OB, Albuquerque RM, Cecatti JG. A randomized trial comparing vaginal misoprostol versus Foley catheter plus oxytocin for labor induction. Acta Obstet Gynecol Scand 2010;89:104552.
  • 20
    Hozo SP, Djulbegovic B, Hozo I. Estimating the mean and variance from the median, range and size of sample. BMC Med Res Methodol 2005;5:13.
  • 21
    ACOG Practice Bulletin Number 106. Intrapartum Fetal Heart Rate Monitoring: Nomenclature, Interpretation, and General Management Principles. Washington, DC: American College of Obstetricians and Gynecologists, 2009.
  • 22
    ACOG Practice Bulletin Number 107. Induction of Labor. Washington DC: American College of Obstetricians and Gynecologists, 2009.
  • 23
    Cullen M. Letter to Health Care Practitioners: Important Drug Warning Concerning Unapproved Use of Intravaginal or Oral Misoprostol in Pregnant Women for Induction of Labor or Abortion. Skokie, IL: Searle, 2000.
  • 24
    ACOG Committee opinion no. 248. Response to Searle’s Drug Warning on Misoprostol. Washington, DC: American College of Obstetricians and Gynecologists, 2000.
  • 25
    Levy R, Kanengiser B, Furman B, Ben Arie A, Brown D, Hagay ZJ. A randomized trial comparing a 30-mL and an 80-mL Foley catheter balloon for preinduction cervical ripening. Am J Obstet Gynecol 2004;191:16326.
  • 26
    Delaney S, Shaffer BL, Cheng YW, Vargas J, Sparks TN, Paul K, et al. Labor induction with a Foley balloon inflated to 30 mL compared with 60 mL: a randomized controlled trial. Obstet Gynecol 2010;115:123945.