Article Title: XYY Study Day Report

Author: Unique – Rare Chromosome Disorder Support Group

Date of Publication: 2008

“Families with a son with XYY – a single extra Y chromosome – met experts and researchers at a study day in Oxford, UK in April 2008. They heard what is already known from research conducted on boys and men with XYY who were identified in the 1960s and what is starting to emerge from a follow-up study of the development of children with an extra sex chromosome, launched last summer in the UK. This study will refine and update knowledge about boys and girls aged between 4 and 16 with Triple X, XYY and XXY (Klinefelter syndrome), and in particular what is known about their behaviour and learning.”

Read more