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Ultrasound could help women avoid unnecessary repeat C-Sections

NCT ID NCT01916044

Knowledge-focused Sponsor: Assistance Publique - Hôpitaux de Paris Source: ClinicalTrials.gov ↗

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 24, 2026 · Last updated Jun 26, 2026 · Updated 2 times

Summary

This study looked at whether an ultrasound measurement of the lower uterine segment can predict the risk of uterine rupture in pregnant women who have had a previous C-section. Over 2,900 women were enrolled to see if using this measurement alongside a decision rule could reduce complications for both mother and baby. The goal is to help more women safely attempt vaginal birth after a C-section.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Ultrasound measurement of the lower uterine segment
What this could lead to
If successful, this could give doctors a reliable way to predict uterine rupture risk, helping more women safely attempt vaginal birth after a C-section and reducing unnecessary repeat C-sections.
What could go wrong
This is a completed trial, but the ultrasound method may not be accurate enough in practice, and results may not apply to all women with a prior C-section.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

2,955 people

The number who actually took part.

Start date

Jul 2013

Finished

Jan 2019

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Female participants only

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * age ≥ 18 years * unique pregnancy * gestational age between 36 SA and 38SA +6 days * cephalic presentation * lower uterine segment section's history * sign consent Exclusion Criteria: * age \< 18 years * history of longitudinal incision's caesarean * iterative caesarean indication * multiple pregnancy * placenta praevia * patient refuse trial of labor * absent consent

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

LABOR Lower uterine segment

Contacts and locations

Locations

  • CHI Poissy Saint Germain

    Poissy, France

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