Method for simultaneous monitoring of uterine contractions and abdominal pushing in a childbirth

Dariusz Stanislaw Radomski


Effective and safe labour requires good cooperation of all the physiological systems. A proper synchronization of uterine and abdominal muscles is necessary for labour progression. Therefore, a new method for simultaneous monitoring of uterine activities and parturient’s pushing efforts is presented. A high sampled, rectified electrohysterographic signal is divided into a low, uterine passband (0.1-3.00Hz) and a high, muscular (40-100Hz) one. The time-dependent mean frequencies arse estimated for each passband separately. At the moments of uterine contraction the time-dependent LOW mean frequency was locally increased. During parturient’s  pushing effort the HIGH mean frequency was increased in the manner typical for the skeletal muscles. It seems that the proposed method would be less sensitive to a measuring noise than the previously published RMS based estimators.  Moreover, the proposed method enables to monitor fatigue of a uterus or abdominal muscles during the prolonged  2nd stage of a labour. It can be helpful to make a decision of Caesarean section.

Full Text:



Sandall J, Tribe RM, Avery L Short-term and Long-Term Effects of Caesarean Section on the Health of Women and Children. 2018, lancet 10155 1349- 13457

Miller JA and DeLancey J On the Biomechanics of Vaginal Birth and Common Sequelae 2009 A0nnu Rev Biomed Eng 11 163-176

Hayes-Gill B., Hassan S., Mirza FG., Ommani S., Himsworth J., Solomon M., Brown R., Schifrin BS., Cohen WR. Accuracy and reliability of uterine contraction identification using abdominal surface electrodes 2012 Clin Med Insights Womens Health, v5 65–75.

Garcia-Casado J, Ye-Lin Y, Prats-Boluda G, Mas-Cabo J, Alberola-Rubio J, Perales A. Electrohysterography in the diagnosis of preterm birth: a review. 2018Physiol Meas 39 02TR01

Young RC The uterine pacemaker of labor. 2018 Best Pract Res Clin Obstet Gynaecol.52 68-87

Potvin JR Effects of Muscle Kinematics on Surface EMG Amplitude and Frequency During Fatiguing Dynamic Contractions 1997 J Appl Physiol 82 144-510

0Alexandersson, A., Steingrimsdottir, T., Terrien, J., Marque, C., Karlsson, B. The Icelandic 16-electrode electrohysterogram database. 2015 Sci. Data 2 150017

Singh P. Breaking the Limits – Redefining the Instantaneous Frequency. Circuits Systems and Signal Processing 2017 37 3515–3536

Konrad P The ABC of EMG 2006 Noraxon Inc USA

Sbrollini A, Strazza A, Candelares S et al. Surface electromyography low-frequency content: Assessment in isometric conditions after electrocardiogram cancellation by the Segmented-Beat Modulation Method. 2018, Inf in Med, 13 71-80

Yousif HA, Zakaria A, Rahim A et al Assessment of Muscles Fatigue Based on Surface EMG Signals Using Machine Learning and Statistical Approaches: A Review 2010 IOP Conf. Ser.: Mater. Sci. Eng 705 012010

Wakeling MJ and Rozitis AL Spectral properties of myoelectric signals from different motor units in the leg extensor muscles 2004 J Exp Biol 207 2519-2528

Sandström A, Altman M, Cnattingius S Durations of second stage of labor and pus0hing, and adverse neonatal outcomes: a population-based cohort study 2017 J Perinatol 236-242.


  • There are currently no refbacks.

International Journal of Electronics and Telecommunications
is a periodical of Electronics and Telecommunications Committee
of Polish Academy of Sciences

eISSN: 2300-1933