A genetic condition in which a male is born with an extra copy of the X chromosome "Klinefelter Syndrome - Topic Overview"

have sparse body hair, enlarged breasts, and wide hips. In almost all men the testicles remain small. "Klinefelter Syndrome - Topic Overview"

• In almost all men the testicles remain small. "Mayo Clinic Staff"
• the penis does not reach adult size."Mayo Clinic Staff"
• voices may not be as deep."Mayo Clinic Staff"
• usually cannot father children. But they can have a normal sex life."Mayo Clinic Staff"

occurs when the genetic material in the egg splits or sperm egg unevenly. it is not passed down through families. "Klinefelter syndrome - Genetics Home Reference"

• its variants are not inherited "Klinefelter syndrome - Genetics Home Reference"
• chromosomal changes usually occur as random events during the formation of reproductive cells (eggs and sperm) in a parent "Klinefelter syndrome - Genetics Home Reference"

1. Testosterone replacement therapy "Mayo Clinic Staff"
2. Educational evaluation and support "Mayo Clinic Staff"

Rare Fewer than 200,000 US cases per year

• Website Title: U.S. National Library of Medicine Article Title: Klinefelter syndrome - Genetics Home Reference Publisher: National Institutes of Health Date Accessed: March 20, 2017
• Website Title: Mayo Clinic Article Title: Treatment Electronically Published: October 04, 2016 Date Accessed: March 20, 2017 Author: Mayo Clinic Staff
• Website Title: WebMD Article Title: Klinefelter Syndrome - Topic Overview Publisher: WebMD Date Accessed: March 20, 2017