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Characteristics of Klinefelter Syndrome

Characteristics of Klinefelter Syndrome

Klinefelter Syndrome (KS) is a chromosomal condition that affects males and causes hypogonadism and infertility. It is the cause of infertility in 10% of the cases of azoospermia, although presence of a reduced number of sperms has been found in some cases.

The physical traits (phenotype) of males affected by KS are:

  • Small testicles
  • Poor muscle development
  • Too long legs and short trunk
  • Sparse or absent facial and body hair
  • Gynecomastia
By BSc, MSc, PhD (senior clinical embryologist), BSc, MSc (embryologist) and BA, MA (fertility counselor).
Last Update: 04/10/2018
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