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The XXY Project
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Welcome
47, XXY
Our Stories
Library
Books
Thinking About Your Child’s Sex Development: Support Information for Parents
Me, Myself and XXY: Growing Up With Chromodiversity
Living With 47XXY, 47XXX & 47XYY (English with Spanish Translation)
The KS Story (You are not alone)
Tomorrow
Gregory and his Extra X
Stories and Tips for Siblings of Children with a Disability or Serious Illness
The X in Sex; And How It Controls Our Lives
The Masculine Mystique of T
Health
Hormones
Testosterone interventions unnecessary for XXY pubertal progression
Oxandrolone Treatment Results in an Increased Risk of Gonadarche in Prepubertal Boys With Klinefelter Syndrome
The Role of Hypogonadism in Klinefelter Syndrome
Clinical Practice Guideline: Testosterone Therapy in Men with Hypogonadism
Gender Dysphoria Services: A Guide For General Practitioners and Other Healthcare Staff
Cognitive
A Review of Neurocognitive Functioning of Children with Sex Chromosome Trisomies
Guidance on the Assessment and Diagnosis of Intellectual Disabilities in Adulthood
KS Increased Brain Responses Not To Visual Stimuli
Understanding Sex Differences to Inform Studies of Diseases of The Nervous System
Beyond the Literal Meaning of Words in Children Who Are XXY
The behavioural profile of children aged 1–5 years with sex chromosome trisomy (47,XXX , 47,XXY , 47,XYY )
Physiology
Mortality in Patients with Klinefelter Syndrome in Britain: A Cohort Study
Genes Underlying Delayed Puberty
Is the prevalence of Klinefelter syndrome increasing?
Recent Advances in Managing and Understanding Klinefelter Syndrome
Chromosomal Variants Amongst XXY (Klinefelter Syndrome)
Clinical Challenges Among 47 XXY Children, Adolescents, and Adults
What Is the Biologic Basis of Variations in Sexual Phenotype
What microRNAs could tell us about the Human X Chromosome
47XXY and Autoimmune Diseases
Are XXY’s more at risk of developing COVID 19?
Fertility
TESE: When is the right time?
So, You Want To Have A Baby?
Educational
Hormone Replacement Therapy
Is the prevalence of Klinefelter syndrome increasing?
Chromosomal Variants Amongst XXY (Klinefelter Syndrome)
Mary F. Lyon (1925–2014)
Recent Advances in Managing and Understanding Klinefelter Syndrome
Dr Michael Noble (47XXY)
Mortality in Patients with Klinefelter Syndrome in Britain: A Cohort Study
A History of Medical Genetics in Pediatrics
Genes Underlying Delayed Puberty
In Perspective
What we wish doctors knew about XXY
Psychology
If you are a parent
The XXY Individual
The Darlington Statement
Mental Health
Mental Health of a Large Group of Adults With Variations of Sex Development in Six European Countries.
Autism and social anxiety in children with sex chromosome trisomies: an observational study.
Anxiety and Depression in Klinefelter Syndrome: The Impact of Personality and Social Engagement
The Lived Experience of 47XXY (Klinefelter Syndrome): A Narrative Review of the Literature
Neurocognitive underpinnings among 47 XXY’s and the association with mental health problems
Finding Your Way With ADHD: Struggles, Supports, and Solutions
An XXY woman with a sword: Weapon Grave at Suontaka Vesitorninmäki, Finland
The Centenary of Genetics: Bridges to the Future
Images
Media
Images
So you think you know sex?
How To Draw a Family Tree
Creative Explanation of Klinefelter’s Syndrome
What is Intersex
X Chromosome Inactivation
A Conversation with David Strachan.
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