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Klinefelter syndrome is not an inherited condition. The extra X chromosome comes from the mother in approximately 50% of the cases. Maternal age is the only known risk factor. Women at 40 years have a four-times-higher risk of a child with Klinefelter syndrome than women aged 24 years. [15] [35] [36]
Bobby Joe Long, a U.S. serial killer with Klinefelter syndrome. Ricardo López, a Uruguayan-American with Klinefelter syndrome who stalked and attempted to murder Icelandic singer Björk in 1996. Small Luk, intersex activist living in Hong Kong, founder of Beyond the Boundary – Knowing and Concerns Intersex [25]
Like women, males with Klinefelter syndrome also have two copies of the X chromosome, which may predispose them to increased risk of autoimmune disease through the same mechanism. [44] This risk is highest in autoimmune diseases which are female-predominant (e.g., Addison's disease, multiple sclerosis, Sjögren syndrome). [ 44 ]
Klinefelter syndrome. Klinefelter’s syndrome occurs when a man is born with one or more extra X chromosomes, leading to a variety of impacts that include underdeveloped testicles, impaired ...
Some intersex people are more likely to experience sexual dissatisfaction or difficulty in sexual functioning. For example, 39.3 percent of men with Klinefelter syndrome and 37.1 to 44.1 percent of women with XY DSD are unsatisfied to very unsatisfied with their sex life compared to 20.8 percent of the general population. [66]
This is an accepted version of this page This is the latest accepted revision, reviewed on 1 February 2025. Atypical congenital variations of sex characteristics This article is about intersex in humans. For intersex in other animals, see Intersex (biology). Not to be confused with Hermaphrodite. Intersex topics Human rights and legal issues Compulsory sterilization Discrimination Human rights ...
XY complete gonadal dysgenesis, also known as Swyer syndrome, is a type of defect hypogonadism in a person whose karyotype is 46,XY. Though they typically have normal vulvas , [ 1 ] the person has underdeveloped gonads, fibrous tissue termed " streak gonads ", and if left untreated, will not experience puberty .
DSDs caused by chromosomal variation generally do not present with genital ambiguity. This includes sex chromosome DSDs such as Klinefelter syndrome, Turner syndrome and 45,X or 46,XY gonadal dysgenesis. [14] Males with Klinefelter syndrome usually have a karyotype of 47,XXY as a result of having two or more X chromosomes. [15]