Klinefelter syndrome - Symptoms and causes - Mayo Clinic
2024年10月29日 · 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. The condition is not passed down in families.
Triple X syndrome - Symptoms & causes - Mayo Clinic
2022年2月2日 · Triple X syndrome, also called trisomy X or 47,XXX, is a genetic disorder that affects about 1 in 1,000 females. Females normally have two X chromosomes in all cells — one X chromosome from each parent. In triple X syndrome, a female has three X chromosomes.
Klinefelter Syndrome: Symptoms, Causes, Diagnosis, and Treatment - WebMD
2024年10月28日 · 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.
Klinefelter syndrome - Wikipedia
Klinefelter syndrome (KS), also known as 47,XXY, is a chromosome anomaly where a male has an extra X chromosome. [10] These complications commonly include infertility and small, poorly functioning testicles (if present).
Triple X Syndrome: Causes, Diagnosis & Treatment - Cleveland Clinic
Triple X syndrome is a genetic condition where a person is born with an extra X chromosome. This condition only happens in people assigned female at birth (AFAB). Many people with triple X syndrome may have no symptoms and may not know they have the condition, or their symptoms could include being unusually tall and fertility issues.
Klinefelter Syndrome: What It Is, Symptoms & Treatment - Cleveland Clinic
2023年10月9日 · Klinefelter syndrome is a common genetic condition in which people assigned male at birth (AMAB) have an additional X chromosome. Symptoms may include breast growth, infertility, osteoporosis and learning difficulties.
About Klinefelter Syndrome - National Human Genome …
2019年5月19日 · Klinefelter syndrome is a condition that occurs in men as a result of an extra X chromosome. The most common symptom is infertility. Humans have 46 chromosomes, which contain all of a person's genes and DNA.
Klinefelter Syndrome - Johns Hopkins Medicine
Klinefelter syndrome occurs when a male is born with an extra X chromosome. Thus a male with Klinefelter has XXY instead of the usual XY pair. Because males with this condition produce less of the male hormone testosterone than other males, they …
Klinefelter Syndrome - MedlinePlus
2024年1月26日 · Klinefelter syndrome (KS) is a genetic condition that happens when a male is born with an extra copy of the X chromosome. KS can affect different stages of physical, language, and social development. It also usually causes infertility. What causes Klinefelter syndrome (KS)? KS is not inherited.
Klinefelter Syndrome: Symptoms, Causes, Treatments, and More - Healthline
2022年2月27日 · Klinefelter syndrome is a genetic disease that causes biological males to be born with an extra copy of the X chromosome in their cells. Males with this condition may not have any symptoms, or...