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  1. 50 Facts About Klinefelter Syndrome

    Feb 19, 2025 · Discover 50 intriguing facts about Klinefelter Syndrome, a genetic condition affecting males. Learn symptoms, diagnosis, and treatment options.

  2. Klinefelter syndrome - Symptoms and causes - Mayo Clinic

    Oct 29, 2024 · Klinefelter syndrome occurs because of a random genetic change in the sperm or the egg. The risk of Klinefelter syndrome is not raised by anything parents do or don't do.

  3. Klinefelter Syndrome: What It Is, Symptoms & Treatment

    Oct 9, 2023 · Klinefelter syndrome is a common genetic condition in which males have an additional X chromosome. Symptoms may include breast growth, infertility, osteoporosis and learning difficulties.

  4. About Klinefelter Syndrome - National Human Genome Research …

    May 19, 2019 · Klinefelter syndrome is a condition that occurs in men as a result of an extra X chromosome. The most common symptom is infertility.

  5. Klinefelter Syndrome (KS)

    Dec 20, 2023 · KS describes a set of physical, language, and social development symptoms in males who have an extra X chromosome. Its main feature is infertility. Outward signs of KS can be subtle, …

  6. Klinefelter syndrome - Wikipedia

    Between 25% and 85% of persons with XXY have some kind of language problem, such as delay in learning to speak, trouble using language to express thoughts and needs, problems reading, and …

  7. Klinefelter Syndrome - Johns Hopkins Medicine

    Most men are born with a pair of XY chromosomes, while most females are born with pair of XX chromosomes. Klinefelter syndrome occurs when a male is born with an extra X chromosome. Thus …

  8. XXY Syndrome - Osmosis

    Mar 4, 2025 · What are the most important facts to know about XXY syndrome? XXY syndrome also known as Klinefelter syndrome, is a genetic condition characterized by the presence of an extra X …

  9. Klinefelter Syndrome: Symptoms, Causes, Diagnosis, and Treatment - WebMD

    Oct 28, 2024 · Klinefelter syndrome, also known as XXY syndrome, is a condition in boys and men that’s caused by an extra X chromosome. It can affect physical and mental development.

  10. Klinefelter syndrome: MedlinePlus Genetics

    Klinefelter syndrome, also called 47,XXY, is a chromosomal condition that affects male development. The signs and symptoms of Klinefelter syndrome vary. In some cases, the features are so mild that …