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CompletedNCT05981469CASPARUpdated Apr 22, 2025

Can Cervical Stiffness Predict Successful Vaginal Delivery After Induction of Labour?

An observational study in Induced Vaginal Delivery, sponsored by University of Liverpool. Completed at 1 site in United Kingdom. Open to female participants aged 18 Years to 50 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-04-22.

Sponsored by University of Liverpool · Observational

Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
100
Ages
18 Years to 50 Years
Sex
Female
01

Study summary

The purpose of this study is to determine if a new antenatal test of cervical stiffness can be used to predict which patients will have a successful vaginal delivery following an induction of labour.

A licensed, CE-marked, vacuum-aspiration device called the Pregnolia system has been developed to give quantitative cervical stiffness index score during pregnancy. The CASPAR study will compare cervical stiffness scores to bishop's scores prior to induction of labour and correlate the results to the outcome of delivery.

Read the detailed description

CASPAR is a single site prospective, exploratory, cohort study of 100 women with singleton pregnancy undergoing induction of labour at the Liverpool Women's Hospital (LWH).

All eligible participants giving written informed consent will be asked to undergo a sterile speculum examination for cervical stiffness assessment, prior to routine vaginal digital examination for Bishop's score assessment. Participants will then proceed with their induction of labour as per the unit policy.

Once recruited the participants will remain in the study until after delivery and discharge from hospital for the mother and baby, or 1 month after delivery, whichever comes first. Outcomes will be collected from electronic records.

02

Conditions studied

  • Induced Vaginal Delivery

Keywords

  • cervical stiffness
  • induction of labour
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In context

Lead sponsor

University of Liverpool is the lead sponsor of 99 studies on the registry; 10 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years to 50 Years
Sexes eligible
Female
Accepts healthy volunteers
Yes
Sampling method
Non-probability sample

Study population

Participants with singleton, term pregnancy, requiring induction of labour.

Inclusion criteria

  • Age ≥ 18 years
  • Being induced
  • Singleton pregnancy
  • Primiparous
  • ≥37+0 weeks gestation
  • Intact membranes
  • Able to provide informed consent

Exclusion criteria

Exclusion criteria:

  • Previous cervical surgery
  • Any cervical pathology at 12 o'clock position on cervix
  • Vaginal bleeding evident on examination
  • Visible, symptomatic cervical or vaginal infections
  • Known congenital uterine anomalies
  • Known or suspected structural/chromosomal fetal abnormality
  • Known HIV
  • Cervical carcinoma
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Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
100 participants (actual)
Patient registry
No

Groups and cohorts

  • Induction of labour

    Device: Cervical Stiffness Assessmenr · Other: Bishop's Score Assessment

Interventions

  • DeviceCervical Stiffness Assessmenr

    The cervical stiffness is assessed by using the licensed, CE-marked Pregnolia System, during a sterile speculum examination. The single-use, sterile Pregnolia Probe is placed on the anterior lip of the cervix at 12 o'clock position and a recording of cervical stiffness is generated over maximum 60 seconds (typically ̴15 seconds) and displayed as Cervical Stiffness Index (CSI) in mbar. The measurement is repeated 3 consecutive times without any time lag.

  • OtherBishop's Score Assessment

    Sterile digital vaginal examination to illicit the Bishop's score (0-12).

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What researchers measure

Primary outcomes

  1. Number of participants with Vaginal Delivery

    Time frame: 5 days (time of commencing induction of labour to outcome of delivery)

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Study locations

1 site
  • Liverpool Women's Hospital
    Liverpool, United Kingdom
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References and documents

Individual participant data

Plan to share: No

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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Apr 22, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT05981469
Lead sponsor
University of Liverpool
Collaborators
Liverpool Women's NHS Foundation Trust
Responsible party
Sponsor
First posted
Aug 8, 2023
Start date
Sep 29, 2023
Primary completion
Nov 29, 2024
Completion
Nov 29, 2024
Last update
Apr 22, 2025

Study contacts

Andrew Sharp
study director · University of Liverpool

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Mar 2025. You cannot join it, but the record below documents what was studied.

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