Labor progress indices and dynamics of the individual uterine contraction during the active stage of labor

Ella Ophir, Jacob Bornstein, Marwan Odeh, Svetlana Kaminsky, Oleg Shnaider, Yuri Megel, Ofer Barnea

Research output: Contribution to journalArticlepeer-review


Aim: To obtain and study new data on the dynamics of the labor process and to develop a contraction-based index of labor progress. Methods: This study was carried out at the Delivery Room, Department of Obstetrics and Gynecology, Western Galilee Hospital, Nahariya, Israel, using a new device (Birth Track). We continuously monitored cervical dilatation (CD) and head descent (HD) in 30 nulliparaous women during active labor with (augmented group) and without (study group) oxytocin augmentation. This led to the development and validation of progress indices based on features extracted from continuous monitoring. Results: There were no significant differences between the average of each parameter in the study and augmented groups, except for HD velocity. Average HD velocity was faster in the study group. Linear regression analyses demonstrated that head station (HS) amplitude and Toco amplitude were the best parameters for predicting HD velocity in both groups. In the study group, average HD velocity was also significantly related to Toco rate and contraction efficiency. In the augmented group, only a weak correlation with Toco rate was seen, and no correlation with contraction efficiency. Conclusion: With the assistance of the Birth Track device, we can obtain continuous data on the labor process and indices to estimate the labor progress process without the use of vaginal (manual) examination.

Original languageEnglish
Pages (from-to)686-693
Number of pages8
JournalJournal of Obstetrics and Gynaecology Research
Issue number3
StatePublished - Mar 2014


  • Active stage of labor
  • Individual uterine contraction
  • Labor progress indices


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