This information supports, and does not replace, advice from your healthcare professional.
Overview
Klinefelter syndrome is a genetic condition in males caused by an extra X chromosome, affecting physical and cognitive development.
Symptoms
Taller than average stature Reduced muscle tone and strength Delayed puberty and small testes Infertility Learning difficulties or language delays
Causes
Extra X chromosome (47,XXY karyotype) Genetic mutation during sperm or egg formation
Diagnosis
Physical examination Hormone testing Genetic testing (karyotype analysis)
Treatment
Testosterone replacement therapy Fertility treatments if desired Speech and educational support Physical therapy and counseling for psychosocial support