Intellectual disability affects about 2–3% of the general population. 75–90% of the affected people have mild intellectual disability. Non-syndromic or idiopathic ID accounts for 30–50% of cases. About a quarter of cases are caused by a genetic disorder. Cases of unknown cause affect about 95 million people . It is more common in males and in low to middle income countries.
symptom of Williams syndrome
symptom of Angelman syndrome
symptom of Rotor syndrome
symptom of Fragile X syndrome
symptom of Buschke–Ollendorff syndrome
symptom of Kallmann syndrome
symptom of Botulism
symptom of Spinocerebellar ataxia type 1