A validation of electrohysterography for uterine activity monitoring during labour

J Matern Fetal Neonatal Med. 2010 Jan;23(1):17-22. doi: 10.3109/14767050903156668.


Objectives: Validation of electrohysterography (EHG) as a method for uterine activity monitoring during labour by comparing with intra-uterine pressure catheter (IUPC) recordings.

Design: Prospective observational study.

Setting: Labour ward in a tertiary centre in the Netherlands.

Population: Thirty-two women in labour.

Methods: Simultaneous recording of uterine activity with EHG and IUPC for at least 30 min.

Main outcome measures: Number of uterine contractions detected by both EHG and IUPC (sensitivity). Number of contractions detected by EHG only [positive predictive value (PPV)]. Correlation between contraction amplitude and duration measured by EHG and IUPC.

Results: EHG detects uterine contractions accurately: sensitivity = 94.5% (95%CI: 87.5-100), PPV = 88.3% (95%CI: 76.2-100). The correlation of contractions' duration and amplitude between both methods is r = 0.31 (95%CI: 0.23-0.39) and r = 0.45 (95%CI: 0.38-0.52), respectively.

Conclusions: EHG detects uterine contractions accurately during labour but the contraction's characteristics it measures are not directly comparable with that of IUPC.

Publication types

  • Validation Study

MeSH terms

  • Adult
  • Body Mass Index
  • Electromyography / methods*
  • Female
  • Gestational Age
  • Humans
  • Labor, Obstetric / physiology*
  • Monitoring, Physiologic / methods
  • Pregnancy
  • Sensitivity and Specificity
  • Uterine Contraction / physiology*