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Updated: Jun 29, 2026

Intrauterine Telemetry to Measure Mouse Contractile Pressure In Vivo
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Does external tocodynamometry increase maternal perception of uterine contractions?

Yolanda Lawson1, Mitchell P Dombrowski, Sharon Carter

  • 1St John Hospital and Medical Center, Wayne State University, Detroit, Michigan, USA.

American Journal of Obstetrics and Gynecology
|November 25, 2003
PubMed
Summary

Placing an external tocodynamometer did not significantly alter the number of perceived contractions in women at risk for preterm delivery. This suggests the device may not influence a woman's subjective experience of uterine activity.

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Area of Science:

  • Obstetrics and Gynecology
  • Maternal-Fetal Medicine
  • Perinatal Research

Background:

  • Preterm delivery is a significant concern in maternal-fetal medicine.
  • Accurate monitoring of uterine contractions is crucial for managing preterm labor risk.
  • Maternal perception of contractions is a subjective measure that may be influenced by external factors.

Purpose of the Study:

  • To investigate the effect of external tocodynamometer placement on maternally perceived contractions.
  • To determine if the device influences the subjective reporting of uterine activity in high-risk pregnancies.

Main Methods:

  • A prospective study involving 63 women at risk for preterm delivery.
  • Maternally perceived contractions were recorded for one hour before and after tocodynamometer placement.

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Last Updated: Jun 29, 2026

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  • Changes in the number of perceived contractions were analyzed.

    • Main Results:

    • Fifteen women reported an increase in perceived contractions.
    • Eleven women reported a decrease in perceived contractions.
    • Thirty-seven women reported no change; the overall change was not statistically significant (P > 0.05).

    Conclusions:

    • External tocodynamometer placement does not appear to significantly alter the number of maternally perceived contractions.
    • The subjective experience of uterine activity in women at risk for preterm delivery may be independent of tocodynamometer application.
    • Further research could explore the impact of other monitoring devices or interventions on perceived contractions.