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hearing impairment occurring before development of speech and language skills.
Aetiology Prelingual hearing loss is largely inherited: 50% are monogenic, 75% are autosomal recessive; 20%, autosomal dominant; 5%, X-linked recessive; the rest are caused by perinatal factors, infections in infancy or trauma
Hearing impairment that is present in infancy and childhood, before language skills are acquired.
See also: deafness