Klinefelter syndrome - Symptoms and causes - Mayo Clinic
Oct 29, 2024 · Klinefelter syndrome occurs because of a random change in the egg or the sperm that causes a baby assigned male at birth to be born with an extra X sex chromosome.
Klinefelter syndrome - Wikipedia
Klinefelter syndrome (KS), also known as 47,XXY, is a chromosome anomaly. [10] Subjects affected by the condition are almost always phenotypically male (except for SRY-negative individuals), with …
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 …
Klinefelter Syndrome - Johns Hopkins Medicine
What is Klinefelter syndrome? 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 …
Klinefelter Syndrome - Children's Hospital of Philadelphia
What is Klinefelter syndrome? Klinefelter syndrome is a chromosomal anomaly that affects males. It occurs when a boy is born with an extra X chromosome. Symptoms can be subtle and many men do …
Clinical features, diagnosis, and management of Klinefelter ...
Jan 2, 2026 · Recognition and treatment of Klinefelter syndrome is important for prevention or treatment of its consequences, such as micropenis, learning disabilities, delayed puberty, infertility, …
Klinefelter Syndrome (KS) - NICHD
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, …