Intellectual disability (ID), also known as mental retardation (MR) is a descriptive term for sub-average intelligence and impaired adaptive functioning arising in the developmental period (< 18 years), affecting around 1 in 50 individuals, and can be caused by a variety of environmental and genetic factors. Genetic forms of ID is considered to have a genetic basis with a monogenic or polygenic mode of inheritance encompasses a broad range of clinical phenotypes which are subdivided into two major categories: syndromic (S-ID) and nonsyndromic ID (NS-ID). IDGenetics is a comprehensive genetic database for intellectual disability, providing integrated genetic, genomic and biological data to facilitate the study of ID.
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