Chromosomes are structures within cells that contain DNA and many. Several genetic abnormalities, such as Fragile X syndrome Fragile X Syndrome Fragile X syndrome is a genetic abnormality on the X chromosome that leads to intellectual disability and behavior problems. For parents of one child with an ASD, risk of having another child with an ASD is around 3 to 10%. The specific causes of autism spectrum disorders are not fully understood, although they are often related to genetic factors.
The classification system emphasizes that, within the broad spectrum, different features may occur more or less strongly in a given individual. read more, although many people with ASDs have both. ASDs are different from Rett syndrome Rett Syndrome Rett syndrome is a rare neurodevelopmental disorder caused by a genetic problem that occurs almost exclusively in girls and affects development after an initial 6-month period of normal development. However, there was so much overlap that it was hard to make distinctions, so doctors currently do not use this terminology and consider these all as ASDs (except for Rett syndrome, which is a distinct genetic disorder). read more, childhood disintegrative disorder, and pervasive developmental disorder not otherwise specified.
Previously, ASDs were subclassified into classic autism, Asperger syndrome, intellectual disability Intellectual Disability Intellectual disability is significantly below average intellectual functioning present from birth or early infancy, causing limitations in the ability to conduct normal activities of daily. Autism spectrum disorders are considered a spectrum (range) of disorders because the manifestations vary widely in type and severity.
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