Subscribe to our newsletter. Klinefelter Syndrome or XXY Male is a common genetic abnormality. Sometimes the diagnosis is made during puberty because of the noticeable and potentially embarrassing physical signs which include enlarged breasts, little body hair and extra height.
Testes are small and there is a tendency toward androgen deficiency.
Affected males are usually sterile. The benefit of knowing early that a baby or child has Klinefelters is that parents can be alert for signals that a child may need medical or developmental intervention. Most symptoms are treatable and early intervention can prevent developmental and educational difficulties. Children often have some degree of language impairment, which can lead to difficulty reading and writing. A boy may require testosterone injections in adolescence.