Medical Dictionary: ASD

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ASD: Another name for Pervasive developmental disorders.
ASD (condition): Group of developmental disorders often recognized before 3 years of age.

ASD: The diagnostic category pervasive developmental disorders (PDD) refers to a group of disorders characterized by delays in the development of multiple basic functions including socialization and communication. Parents may note symptoms as early as infancy and typically onset is prior to 3 years of age. 1

More information on medical condition: Pervasive developmental disorders:

1. excerpt from NINDS Pervasive Developmental Disorders Information Page: NINDS

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