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When do symptoms of autism appear?

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Symptoms of autism typically appear during the first three years of life. Some children show signs from birth. Others seem to develop normally at first, only to suddenly show symptoms when they are 18 to 36 months old. However, it is now recognized that some individuals may not show symptoms of a communication disorder until demands of the environment exceed their capabilities. Autism is four times more common in boys than in girls. It knows no racial, ethnic, or social boundaries. Family income, lifestyle, or educational levels do not affect a child's chance of being autistic.

From: Understanding Autism -- the Basics WebMD Medical Reference

SOURCE: 

American Academy of Pediatrics: Pediatrics 2010. 

Parker, S., Zuckerman, B., and Augustyn, M. (editors). Lippincott, 2005. Developmental and Behavioral Pediatrics: A Handbook for Primary Care,

American Psychiatric Association: Diagnostic and Statistical Manual of Mental Disorders version 5 ( DSM-5

Reviewed by Smitha Bhandari on February 14, 2019

SOURCE: 

American Academy of Pediatrics: Pediatrics 2010. 

Parker, S., Zuckerman, B., and Augustyn, M. (editors). Lippincott, 2005. Developmental and Behavioral Pediatrics: A Handbook for Primary Care,

American Psychiatric Association: Diagnostic and Statistical Manual of Mental Disorders version 5 ( DSM-5

Reviewed by Smitha Bhandari on February 14, 2019

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