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AXYS - The Association for X&Y Chromosome Variations
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Autism Spectrum Disorder

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Early symptoms of autism spectrum disorder in children with sex chromosome trisomies

Article Title: Early symptoms of autism spectrum disorder (ASD) in 1–8 year old children with sex chromosome trisomies (XXX, XXY, XYY), and the predictive value of joint attention

Authors: Bouw, Swaab, Tartaglia, Wilson, van der Velde, and van Rijn

Date of Publication: September 15, 2022

“These findings show a neurodevelopmental impact of the extra X or Y chromosome on social adaptive development associated with risk for ASD already from early childhood onward. These findings advocate for close monitoring and early (preventive) support, aimed to optimize social development of young children with SCT.”

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Early Social Behavior in Young Children with Sex Chromosome Trisomies (Trisomy X, XXY, XYY)

Article Title: Early Social Behavior in Young Children with Sex Chromosome Trisomies (XXX, XXY, XYY): Profiles of Observed Social Interactions and Social Impairments Associated with Autism Spectrum Disorder (ASD)

Authors: Bouw, Swaab, Tartaglia, Cordeiro, and van Rijn

Date of Publication: March 23, 2022

“Individuals with Sex Chromosome Trisomies (SCT; XXX, XXY, XYY) have an increased vulnerability for developing challenges in social adaptive functioning. The present study investigates social interaction behavior in the context of varying social load, and Autism Spectrum Disorder (ASD) symptomatology in young children aged 1–7.5 years old, with SCT (N = 105) and control children (N = 101). Children with SCT show less interaction behaviors and more social withdrawal, as compared to their control peers, which were most evident in the high social load condition. Second, social impairments related to ASD are more prevalent, as compared to controls (27.1% at clinical level). These findings stress the importance of early monitoring and (preventive) support of early social development in young children with SCT.”

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