Klinefelter syndrome (https://homosaurus.org/v3/homoit0000692)




Identifier
homoit0000692
Preferred Label
Klinefelter syndrome
English
Alternative Label
47XXY
English
Description
People with Klinefelter syndrome develop with an extra copy of the X chromosome, resulting in a 47XXY pattern (instead of the typical 46XY). These individuals might have smaller-than-typical testes that produce lower amounts of testosterone and/or sperm, and they may start puberty later than typical (or may not go through puberty without hormone therapy). They may grow taller than usual, may develop breast tissue, and often experience infertility. This variation often does not cause obvious physical differences, and many people do not realize they have it.
English
History Note
Term updated in collaboration with interACT: Advocates for Intersex Youth, 2022-2023.
English
Contributors
Revised during an extended collaboration with interACT: Advocates for Intersex Youth, 2022-2023.
English
Sources
https://livingwithxxy.org/
English
Issued (Created)
2019-05-14 07:04:02 UTC
Modified
2021-12-08 09:35:47 UTC
Broader
Intersex variations [homoit0000669]
Replaces
http://homosaurus.org/v2/klinefelterSyndrome
LCSH Exact Match
Klinefelter's syndrome [http://id.loc.gov/authorities/subjects/sh85072641]

Hierarchy Display

Intersex variations
Klinefelter syndrome


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