midwifery-a-z
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 […]

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