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Reciprocal Mother-Infant Voice Exposure in the Neonatal Intensive Care Unit

Hearing Each Other: Effects of Reciprocal Maternal-Infant Voice Exposure on Maternal Attachment and Breastfeeding in the NICU: A Randomized Controlled Trial

Status
Completed
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07597954
Enrollment
60
Registered
2026-05-20
Start date
2022-10-01
Completion date
2023-09-30
Last updated
2026-05-20

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Breastfeeding, Maternal Attachment, Neonatal Intensive Care Unit, Transient Tachypnea of the Newborn

Keywords

Maternal voice, Auditory stimulation, NICU, Breastfeeding outcomes, Maternal attachment, Randomized controlled trial

Brief summary

This randomized controlled trial evaluates the effect of reciprocal maternal-infant voice exposure on maternal attachment and breastfeeding outcomes in a neonatal intensive care unit (NICU). Infants in the intervention group are exposed to recordings of their mothers' voices, while mothers simultaneously listen to recordings of their infants' sounds between the 6th and 12th postpartum hours. The intervention is administered every 2 hours for 30 minutes. Outcomes include maternal attachment, breastfeeding effectiveness, breastfeeding self-efficacy, infant feeding intention, perceived insufficient milk, and expressed breast milk volume. Neonatal physiological parameters and blood gas values are also assessed. The findings aim to support family-centered NICU care through non-invasive auditory interventions.

Interventions

BEHAVIORALReciprocal Voice Exposure Group

Reciprocal auditory stimulation consisting of maternal voice recordings played to infants and infant sound recordings played to mothers every 2 hours for 30 minutes between the 6th and 12th postpartum hours.

Sponsors

Biruni University
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
SUPPORTIVE_CARE
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Mothers aged ≥18 years * Infants ≥37 weeks gestation * Diagnosis of transient tachypnea of the newborn (TTN) * Infant admitted to NICU ≥6 hours * Ability to communicate in Turkish

Exclusion criteria

* Infant clinical deterioration requiring transfer * Maternal psychiatric disorder * Hearing impairment

Design outcomes

Primary

MeasureTime frameDescription
Maternal Attachment12th postpartum hourMeasured using the Maternal Attachment Inventory (26 items; scores range from 26 to 104; higher scores indicate stronger attachment).
Breastfeeding Effectiveness12th postpartum hourMeasured using the Bristol Breastfeeding Assessment Tool (scores range from 0 to 8; higher scores indicate more effective breastfeeding).

Secondary

MeasureTime frameDescription
Breastfeeding Self-Efficacy12th postpartum hourMeasured using the Breastfeeding Self-Efficacy Scale-Short Form (14 items; scores range from 14 to 70; higher scores indicate greater self-efficacy).
Infant Feeding Intention12th postpartum hourMeasured using the Infant Feeding Intention Scale. Scores range from 0 to 16; higher scores indicate stronger intention to breastfeed.
Perceived Insufficient Milk12th postpartum hourMeasured using the Perceived Insufficient Milk Scale. Higher scores indicate greater perceived milk insufficiency.
Expressed Breast Milk VolumeBetween 6th and 12th postpartum hoursVolume of breast milk expressed using an electric pump, measured in milliliters (mL).
Neonatal Physiological Parameters6th, 8th, 10th, and 12th postpartum hoursRespiratory Rate: Measured in breaths per minute.
Oxygen Saturation6th, 8th, 10th, and 12th postpartum hours.Peripheral oxygen saturation measured as percentage (%).
Heart Rate6th, 8th, 10th, and 12th postpartum hours.Heart rate measured in beats per minute (bpm).
Partial Pressure of Oxygen (pO₂)Between 6th and 12th postpartum hours.Partial pressure of oxygen measured in mmHg.
Partial Pressure of Carbon Dioxide (pCO₂)Between 6th and 12th postpartum hours.Partial pressure of carbon dioxide measured in mmHg.
Blood pHBetween 6th and 12th postpartum hours.Blood pH measured as a unitless value.
Blood Lactate LevelBetween 6th and 12th postpartum hours.Blood lactate level measured in mmol/L.

Countries

Turkey (Türkiye)

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: May 21, 2026