Vocal development of infants with very low birth weight

Area of Science:

• Neonatal development
• Speech and language pathology
• Pediatric pulmonology

Background:

• Infants born with very low birth weights (VLBW) face numerous developmental challenges.
• Bronchopulmonary dysplasia (BPD) is a common complication in preterm infants, potentially impacting neurodevelopment.
• Vocal development is a sensitive indicator of early neurodevelopmental trajectories.

Purpose of the Study:

• To compare the vocal development of preterm VLBW infants with and without BPD to healthy full-term infants.
• To assess the impact of BPD on canonical babbling and expressive vocabulary acquisition.
• To track vocal development milestones at 8, 12, and 18 months corrected age.

Main Methods:

• Longitudinal study recording vocalizations from three infant groups: VLBW with BPD, VLBW without BPD, and full-term controls.
• Analysis of canonical syllable production and expressive vocabulary size at 8, 12, and 18 months.
• Statistical comparison of vocalization patterns across the three groups.

Main Results:

• Infants with BPD consistently showed significantly lower canonical syllable ratios compared to full-term infants.
• Preterm infants without BPD exhibited delayed canonical babbling at 8 months but reached full-term ranges by 18 months.
• At 18 months, infants with BPD had significantly smaller expressive vocabularies than both healthier preterm and full-term infants.

Conclusions:

• Bronchopulmonary dysplasia significantly impacts early vocal development, affecting babbling and vocabulary acquisition.
• While some VLBW infants without BPD show initial delays, they can catch up developmentally.
• Early identification and intervention for vocal delays in VLBW infants, particularly those with BPD, are crucial.