Parents Advocate for Son’s Educational Needs

A couple in the U.K. are fighting to help their son with 47,XYY get what he needs to be successful in school. [...]

Growing Up with XYY

An article with general information about XYY Syndrome. Read the entire article. An excerpt: "Approximately one boy in 1000 has XYY chromosomes. [...]

Findings from an XYY Study

Read the entire article. From the introduction: "Families with a son with XYY – a single extra Y chromosome – met experts [...]

Brain Morphology in Children with 47,XYY Syndrome: A Voxel and Surface-based Morphomeric Study

An article by Jean-Francois Lepage, David S. Hong, Mira Raman, Matthew Marzelli, David P. Roeltgen, Song Lai, Judith Ross, and Allan L. [...]

Sex Chromosomes and the Brain: A Study of Neuroanatomy in XYY Syndrome

An article by Daniel M Bryant, Fumiko Hoeft, Song Lai, John Lackey, David Roeltgen, Judith Ross, and Allan L Reiss. Read the [...]

An Extra X or Y Chromosome: Contrasting the Cognitive and Motor Phenotypes in Childhood in Boys with 47,XYY Syndrome or 47,XXY Klinefelter Syndrome

This is a scholarly article by Judith L. Ross, Martha P.D. Zeger, Harvey Kushner, Andrew R. Zinn, and David P. Roeltgen. Read [...]

Comparing 47,XXY and 47,XYY boys

Here is a good research article on comparing the similarities and differences in boys with 47,XXY and 47,XYY from a neurocognitive testing [...]

ADHD – More research from the team at the eXtraordinarY Kids Clinic in Denver

Attention-Deficit Hyperactivity Disorder Symptoms in Children and Adolescents with Sex Chromosome Aneuploidy: XXY, XXX, XYY, and XXYY Tartaglia, Nicole R. MD; Ayari, [...]

Autism spectrum disorders in XYY syndrome: two new cases and systematic review of the literature

By: Lucia Margari, Anna Linda Lamanna, Francesco Craig, Marta Simone, Mattia Gentile Abstract Abnormalities of the sex chromosomes (47, XXY, 47 XYY, [...]

Testicular size and shape of 47,XYY and 47,XXY men in a double-blind, double-matched population survey

E. Boisen Published: November 1979 ABSTRACT This paper reports the testicular size and shape of 12 men with 47,XYY, 14 men with [...]