• 1
    Ray A, Hildreth A, Essen UI. Morbid obesity and intrapartum care. J Obstet Gynecol. 2008;28:3014.
  • 2
    Fisher SC, Kim SY, Sharma AJ, Rochat R, Morrow B. Is obesity still increasing among pregnant women? Prepregnancy obesity trends in 20 states, 2003–2009. Prev Med. 2013;56:3728.
  • 3
    Ehrenberg HM, Dierker L, Milluzzi C, Mercer BM. Prevalence of maternal obesity in an urban center. Am J Obstet Gynecol. 2002;187:118993.
  • 4
    Heslehurst N, Rankin J, Wilkinson JR, Summerbell CD. A nationally representative study of maternal obesity in England, UK: trends in incidence and demographic inequalities in 619,323 births, 1989–2007. Int J Obes. 2010;34:4208.
  • 5
    Bowers D, Cohen WR. Obesity and related pregnancy complications in an inner city clinic. J Perinatol. 1999;19:2169.
  • 6
    Davies GA, Maxwell C, McLeod L, Gagnon R, Basso M, Bos H, et al. Obesity in pregnancy. J Obstet Gynaecol Can. 2010;32:16573.
  • 7
    Verdiales M, Pacheco C, Cohen WR. Effect of maternal obesity on the course of labor. J Perinat Med. 2009;37:6515.
  • 8
    Soni S, Chavan N, Cohen WR. Effect of maternal body mass index on oxytocin treatment for arrest of dilatation. J Perinat Med. 2013;21:15.
  • 9
    Committee Opinion Number 549. Obesity in pregnancy. Washington, DC: American College of Obstetricians and Gynecologists, 2013.
  • 10
    Cohen WR, Ommani S, Hassan S, Mirza F, Solomon M, Brown R, et al. Accuracy and reliability of fetal heart rate monitoring using maternal abdominal surface electrodes. Acta Obstet Gynecol Scand. 2012;91:130613.
  • 11
    Hayes-Gill B, Hassan S, Mirza F, Ommani S, Himsworth J, Solomon M, et al. Accuracy and reliability of uterine contraction identification using abdominal surface electrodes. Clin Med Insights. 2012;5:6575.
  • 12
    Bakker PC, Zikkenheimer M, van Geijn HP. The quality of intrapartum uterine activity monitoring. J Perinat Med. 2008;36:197201.
  • 13
    Bakker PC, Colenbrander GJ, Verstraeten AA, Van Geijn HP. The quality of intrapartum fetal heart rate monitoring. Eur J Obstet Gynecol Reprod Biol. 2004;116:227.
  • 14
    Harper LM, Shanks AL, Tuuli MG, Roehl KA, Cahill AG. The risks and benefits of internal monitors in laboring patients. Am J Obstet Gynecol. 2013;209:e16.
  • 15
    Altman DG, Bland JM. Measurement in medicine: the analysis of method comparison studies. The Statistician. 1983;32:30717.
  • 16
    Bland JM, Altman DG. Statistical methods for assessing agreement between two methods of clinical measurement. Lancet. 1986;1:30710.
  • 17
    Neilson DR Jr, Freeman RK, Mangan S. Signal ambiguity resulting in unexpected outcome with external fetal heart rate monitoring. Am J Obstet Gynecol. 2008;198:71724.
  • 18
    Ibrahimy MI, Mohd Ali MA, Zahedi E, Tsuruoka S. A comparison of abdominal ECG and Doppler ultrasound for fetal heart rate detection. Front Med Biol Eng. 2002;11:30722.
  • 19
    Reinhard J, Hayes-Gill BR, Yi Q, Hatzmann H, Schiermeier S. Comparison of non-invasive fetal electrocardiogram to Doppler cardiotocogram during 1st stage of labor. J Perinat Med. 2010;38:17985.
  • 20
    Euliano TY, Nguyen MT, Darmanjian S, McGorray SP, Euliano N, Onkala A, et al. Monitoring uterine activity during labor: a comparison of 3 methods. Am J Obstet Gynecol. 2013;208:e16.
  • 21
    Jacod BC, Graatsma EM, Van Hagen E, Visser GH. A validation of electrohysterography for uterine activity monitoring during labour. J Matern Fetal Neonatal Med. 2010;23:1722.
  • 22
    Reinhard J, Hayes-Gill BR, Schiermeier S, Hatzmann W, Herrmann TM, Louwen F. Intrapartum signal quality with external fetal heart rate monitoring: a two-way trial of external Doppler CTG ultrasound and the abdominal fetal electrocardiogram. Arch Gynecol Obstet. 2012;286:11037.
  • 23
    Stampalija T, Signaroldi M, Mastroianni C, Rosti E, Signorelli V, Casati D, et al. Fetal and maternal heart rate confusion during intra-partum monitoring: comparison of trans-abdominal fetal electrocardiogram and Doppler telemetry. J Matern Fetal Neonatal Med. 2012;25:151720.
  • 24
    Euliano TY, Nguyen MT, Marossero D, Edwards RK. Monitoring contractions in obese parturients: electrohysterography compared with traditional monitoring. Obstet Gynecol. 2007;109:113640.
  • 25
    Graatsma EM, Miller J, Mulder EJ, Harman C, Baschat AA, Visser GH. Maternal body mass index does not affect performance of fetal electrocardiography. Am J Perinatol. 2010;27:5737.