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Dim lights may boost labor: simple trick to avoid C-Sections?

NCT ID NCT04521972

Knowledge-focused Sponsor: Michigan State University Source: ClinicalTrials.gov ↗

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 26, 2026 · Updated 2 times

Summary

This study tests whether adjusting room light during labor can improve uterine contractions and reduce the need for C-sections. Researchers will monitor 100 pregnant women, using different light settings (bright, dim, or red light) to see how it affects contractions and melatonin release. The goal is to find a simple, non-drug way to make labor more successful.

What this could mean

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

Active substance
room light manipulation (device)
What this could lead to
If it works, this could point toward a simple, drug-free way to improve labor success and reduce C-sections.
What could go wrong
This is a small, early study with only 100 participants, so results may not apply to all women. The effect of light on contractions is still uncertain.

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

About 100 people

The number the study aims to enrol. It can still change while the study runs.

Started

Sep 2025

Expected to finish

Sep 2029

An estimate. End dates often move.

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 42 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: * Are pregnant * Are 18-42 years old * Medically cleared for participation by Medical Investigator * Willingness to allow the study access to information in the participant's medical record * Willingness to be notified of incidental findings from study procedures * Willingness to measure and report on lighting conditions during specified time periods * Willingness to use a uterine contraction home monitor system, and report results * Willingness to adapt lighting during studies in home and/or hospital * Willingness to wear blue-filter glasses if requested * Willingness to report use of melatonin (for sleep) * Willingness to stop melatonin use if requested Exclusion criteria * Pre-pregnancy BMI \>36kg/m2 * HIV or AIDS (self-reported) * Severe anemia (hemoglobin \<8g/dL and/or hematocrit \<24%) * History or current psychotic disorder or diagnosis of a current major depressive episode or bipolar disorder * Current use of one or more of the following medications: metformin, systemic steroids, antipsychotic agents (e.g., Abilify, Haldol, Risperdal, Seroquel, Zyprexa), anti-seizure medications or mood stabilizers that would be expected to have a significant impact on body weight (e.g., Depakote, Lamictal, Lithium, Neurontin, Tegretol, Topamax, Keppra), medications for ADHD including amphetamines and methylphenidate * Continued use of weight loss medication including OTC and dietary supplements for weight loss (e.g., Adipex, Suprenza, Tenuate, Xenical, Alli, conjugated linoleic acid, Hoodia, Green tea extract, Guar gum, HydroxyCut, Sensa, Corti-slim, Chromium, chitosan, Bitter orange) Other Exclusion Criteria * Recent history of or currently smoking, drinking alcohol or abusing drugs (prescription or recreational) * Plans to move out of the study area within the next year or plans to be out of the study area for more than 8 weeks in the next 12 months * Planned termination of pregnancy

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Conditions

The condition(s) this trial relates to.

pregnancy disorder

As listed by the trial registrant

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

Labor; poor Pregnancy related Uterine contractions weak

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Michigan State University

    RECRUITING

    East Lansing, Michigan, 48824, United States

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