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Term Definition

Hermaphroditism and intersex are older terms for a group of conditions increasingly referred to as Disorders of Sex Development (DSD) where there is a discrepancy in an individual between the external genitals and the internal genitals (the testes and ovaries).

[See Medline Plus: Intersex ]

DSD can result from changes (mutations) in specific genes, or from the gain or loss of the X and Y sex chromosomes e.g. Turner syndrome 45, XO (only one X chromosome) and Kleinfelter syndrome 47, XXY (an extra sex chromosome, either an X or Y).

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