Effects of Dim Light During Labor on Pain, Anxiety, and Labor Progress

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

NA

Total Enrollment

120 participants

Study Classification

INTERVENTIONAL

Study Start Date

2026-01-06

Study Completion Date

2026-05-31

Brief Summary

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The environment of the labor room may influence how women experience childbirth. Light levels, in particular, may affect comfort, stress, and the course of labor. However, there is limited high-quality evidence on whether keeping the labor room lighting dim has measurable benefits for mothers.

This study aims to evaluate the effects of dim light exposure during active labor on pain, anxiety, and labor progress. Pregnant women who are in active labor at term will be randomly assigned to one of two groups. One group will give birth in a room with dim lighting (50-80 lux), while the other group will receive standard room lighting as part of routine care.

Pain and anxiety levels will be measured at specific time points during labor using standard assessment scales. Information about labor duration, use of labor medications, mode of delivery, and newborn outcomes will also be collected.

The dim light intervention does not interfere with routine obstetric care and does not pose additional risk to the mother or baby. If needed for clinical reasons, room lighting can be increased immediately. The results of this study may help determine whether a simple change in the birth environment can improve maternal comfort and labor outcomes.

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Detailed Description

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This study is a single-center, parallel-group randomized controlled trial designed to evaluate the effects of dim light exposure during active labor on maternal pain, anxiety, and labor progress. The trial is conducted in a university hospital labor ward and includes term pregnant women in active labor.

Eligible participants are women aged 18-45 years with a singleton, vertex-presenting pregnancy at ≥37 weeks of gestation who are in active labor. Participants are allocated to one of two study groups according to a predefined randomization scheme. To minimize contamination between groups, cluster randomization by delivery room and week is applied.

In the intervention group, labor room lighting is adjusted to a dim light environment with an illumination level maintained between 50 and 80 lux, using warm white or amber light sources. Light intensity is monitored at regular intervals using a lux meter. In the control group, routine labor room lighting conditions are maintained in accordance with standard clinical practice.

Pain intensity and anxiety levels are assessed at predefined time points during labor using validated measurement tools. Labor progress and obstetric outcomes, including use of labor augmentation, duration of labor stages, mode of delivery, and neonatal outcomes, are recorded from clinical charts.

The primary outcome is derived from changes in pain intensity over time during labor. Secondary outcomes include anxiety levels, labor characteristics, and maternal and neonatal clinical outcomes.

The dim light intervention is non-invasive and does not interfere with routine obstetric care. For clinical or safety reasons, room lighting can be increased immediately at any time at the discretion of the clinical team. All participants receive standard intrapartum care according to institutional protocols.

Study data are collected prospectively and stored in an anonymized format to ensure participant confidentiality. The study is conducted in accordance with ethical principles and has received approval from the relevant institutional ethics committee.

Conditions

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Labor Pain and Anxiety Labor Progress

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Participants are assigned to one of two parallel study groups. To reduce contamination between groups, cluster randomization by delivery room and study week is applied.

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Dim Light (50-80 Lux)

Labor room lighting will be maintained at 50-80 lux using warm white/amber light sources. Illumination will be monitored at regular intervals with a lux meter. Standard intrapartum care will be provided; lighting may be increased immediately if clinically needed.

Group Type EXPERIMENTAL

Dim Light Exposure During Labor

Intervention Type OTHER

Adjustment of labor room illumination to a target range of 50-80 lux during active labor, with monitoring using a lux meter; lighting can be increased at any time for clinical reasons.

Routine Lighting (Control)

Routine labor room lighting will be maintained according to standard clinical practice. Standard intrapartum care will be provided.

Group Type ACTIVE_COMPARATOR

Routine Labor Room Lighting

Intervention Type OTHER

Standard labor room lighting conditions maintained according to routine clinical practice, without modification of illumination levels.

Interventions

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Dim Light Exposure During Labor

Adjustment of labor room illumination to a target range of 50-80 lux during active labor, with monitoring using a lux meter; lighting can be increased at any time for clinical reasons.

Intervention Type OTHER

Routine Labor Room Lighting

Standard labor room lighting conditions maintained according to routine clinical practice, without modification of illumination levels.

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

Pregnant individuals aged 18-45 years

Singleton pregnancy

Vertex (cephalic) presentation

Gestational age ≥37 weeks

Active labor at enrollment (cervical dilation between 4 and 8 cm)

Ability to provide written informed consent

Exclusion Criteria

Planned or ongoing epidural analgesia

Multiple pregnancy

Severe preeclampsia or other obstetric complications requiring immediate intervention

Known photosensitivity or light-related sensitivity disorders

History of psychiatric disorders that may interfere with anxiety assessment

Any condition deemed by the clinical team to require deviation from the study protocol

Minimum Eligible Age

18 Years

Maximum Eligible Age

45 Years

Eligible Sex

FEMALE

Accepts Healthy Volunteers

Yes