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The rate of Klinefelter syndrome among infertile males is 3.1%. The syndrome is the main cause of male hypogonadism. [ 68 ] One survey in the United Kingdom found that the majority of people with KS identify as male, however, a significant number have a different gender identity . [ 69 ]
48,XXYY syndrome is a condition related to the X and Y chromosomes (the sex chromosomes). People normally have 46 chromosomes in each cell.Two of the 46 chromosomes, known as X and Y, are called sex chromosomes because they help determine whether a person will develop male or female sex characteristics.
XX male syndrome, also known as de la Chapelle syndrome, is a rare intersex condition in which an individual with a 46,XX karyotype develops a male phenotype. [2] Synonyms for XX male syndrome include 46,XX testicular difference of sex development (or 46,XX DSD) [3] [4] [5] [6]
Some men have medical conditions that impair testicular testosterone production, such as Klinefelter’s syndrome. This type of testosterone deficiency is known as primary testicular failure or ...
XYY syndrome, also known as Jacobs syndrome, is an aneuploid genetic condition in which a male has an extra Y chromosome. [1] There are usually few symptoms. [2] These may include being taller than average and an increased risk of learning disabilities. [1] [2] The person is generally otherwise normal, including typical rates of fertility. [1]
The symptoms of Klinefelter's syndrome in a human male.. 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.
The symptoms of 48,XXXY syndrome are similar to those of Klinefelter syndrome, though the symptoms are usually more severe in 48,XXXY syndrome.Like Klinefelter syndrome, the presence of additional X chromosomes affects the male reproductive system, can cause physical abnormalities, and can affect cognitive development.
XXXYY syndrome was first recorded in 1963, in a 26-year-old man with a moderate intellectual disability living at the Utah State Training School who was ascertained due to having physical traits of Klinefelter syndrome. By that time, three men with XXYY syndrome had been reported.