Tehran University of Medical Sciences Journal of Modern Rehabilitation 2538-385X 0 - 2026 04 27 1458 1458 Nasrin Gohari Hearing Disorders Research Center, Avicenna Institute of Clinical Sciences, Hamadan University of Medical Sciences, Hamadan, Iran AND Department of Audiology, School of Rehabilitation, Hamadan University of Medical Sciences, Hamadan, Iran Bita Ghorbani Aghdam Hearing Disorders Research Center, Avicenna Institute of Clinical Sciences, Hamadan University of Medical Sciences, Hamadan, Iran Mahdi Khoshfetrat Hearing Disorders Research Center, Avicenna Institute of Clinical Sciences, Hamadan University of Medical Sciences, Hamadan, Iran 2025 10 28 2026 03 19 Introduction: The type of feeding has different effects, and the effects of breastfeeding on the auditory system, speech and language has also been confirmed. The aim of this study is to provide a comprehensive review of various studies conducted on the effects of different feeding types on the auditory system, speech and language. Materials and Methods:  A narrative review was conducted using PubMed, Scopus, Medline, Web of Science, Google Scholar, ScienceDirect, and the Cochrane Library to identify English-language studies on the effects of feeding type on auditory, speech, and language development. A total of 57 studies published between 1981 and 2025 were identified and selected based on predefined inclusion criteria, and the findings were synthesized to evaluate developmental outcomes. Results: Breastfeeding has different effects on various aspects of hearing, speech, language, and cognition in children compared to formula feeding. Breastfeeding, as a protective factor against middle ear. Breastfeeding is associated with better speech and language development, including verbal intelligence, better receptive and expressive language, improved language skills, and the natural development of oral-motor skills necessary for speech production. Conclusion: As the optimal source of nutrition for infants, breast milk not only meets physical and motor needs but also contributes to optimal functioning of the peripheral and central auditory systems. It plays a significant role in enhancing communication skills, speech and language development, and related abilities.This review is limited by its narrative design and the heterogeneity of existing studies; future research should employ standardized, longitudinal methodologies to clarify causal mechanisms. https://jmr.tums.ac.ir/index.php/jmr/article/view/1458