The purpose of this work is to relate review researches about speech language impairment in relation to the families' perceptions, clinical categorization, language evolution, genetic and others medical researches, comorbities, speech and language therapies and prognostic. The data researched was of the seven last years journals of Medline e Scielo. Among the findings, the distinguished ones were the families' perception about speech language impairment, the necessity of language pathologist diagnosis and the efficiency of early intervention programs with health agents. Language evolution stages may be known and observed by infancy health professionals for the early detection of speech language impairment. The therapeutic progress, the school and social adaptation may be better if the intervention begins at two years old.
Language Development; Language; Diagnosis
