Klinefelter syndrome Klinefelter syndrome is a chromosomal abnormality affecting around 1 in 600 newborn boys, in which the boy is born with an extra X chromosome (XXY). It is not usually diagnosed before the expected onset of puberty, although some boys will be born with undescended testicles. Males with Klinefelter syndrome may not produce sufficient […]

Signup for Newsletter

Register your email to keep up to date with the latest information directly to you.

Translate »