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What causes intellectual disability?

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Intellectual disability affects about 1% to 3% of the population. There are many causes of intellectual disability, but doctors find a specific reason in only 25% of cases. Risk factors are related to the causes. read more

Anytime something interferes with normal brain development, intellectual disability can result. However, a specific cause for intellectual disability can only be pinpointed about a third of the time. The most common causes of intellectual disability are: Genetic conditions. read more

Still other causes of intellectual disability do not occur until a child is older; these might include serious head injury, stroke, or certain infections. read more

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