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Labour and lunch: new study checks if contractions slow stomach emptying

NCT ID NCT03490682

Knowledge-focused Sponsor: Hospices Civils de Lyon Source: ClinicalTrials.gov ↗

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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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 26, 2026 · Last updated Jun 26, 2026

Summary

This study looked at whether being in labour affects how quickly a light meal (flavoured yoghurt) leaves the stomach. Researchers used ultrasound to measure stomach emptying in 43 women: those in labour with or without epidural, pregnant women not in labour, and non-pregnant women. The goal is to provide data that could help clarify conflicting guidelines on eating during labour.

What this could mean

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

What this could lead to
If successful, this study could provide evidence to update guidelines on whether women in labour can safely eat light food.
What could go wrong
This is a small observational study (43 participants) that only measures stomach emptying, not safety outcomes like aspiration. Results may not apply to all women or different foods.

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

43 people

The number who actually took part.

Started

May 2018

Finished

Nov 2021

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 to 40 years

Sex

Female participants only

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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: Informed consent must have been signed. The last consumption of solids will have taken place more than 6 hours before the start of the study, the last consumption of clear fluids will have taken place more than 1 hour before the start of the study, in the three groups. * Non-pregnant control group : adult females less than 40 years old with no significant medical history (American Society of Anesthesiologists ASA class 1) * Pregnant group : adult females less than 40 years old with no significant medical history (American Society of Anesthesiologists ASA class 1) in the third trimester of pregnancy (gestation greater than 32 weeks on the day of the study). * Analgesia group : adult females less than 40 years old with no significant medical history (American Society of Anesthesiologists ASA class 1, in labour in the delivery room, receiving effective epidural analgesia, having an empty stomach on the initial ultrasound examination, and authorised to ingest solid foods during labour (cervical dilatation strictly less than 8cm) according to local guidelines. * Parturient group : adult females less than 35 years old with no significant medical history (American Society of Anesthesiologists ASA class 1, in labour in the delivery room, no epidural analgesia, having an empty stomach on the initial ultrasound examination, and authorised to ingest solid foods during labour (cervical dilatation strictly less than 8cm) according to local guidelines Exclusion Criteria: * Refusal to participate in this study * Patient unable to speak French * Oesophageal, duodenal or gastric medical or surgical history Pregnant group : Threatened premature labour, multiple pregnancy, pathological pregnancy Analgesia and Parturient groups : * gestation less than 38 weeks * multiple pregnancy * All pathology of the pregnancy or complication during labour * Delivery * Patient admission for therapeutic interruption of the pregnancy

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As listed by the trial registrant

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

Healthy volunteers Parturition Pregnancy

Contacts and locations

Locations

  • Hospices Civils de Lyon

    Bron, 69500, France

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