As XXY males enter puberty, they often don't make as much testosterone as other boys.
This can lead to a taller, less muscular body, less facial and body hair, and broader hips than other boys.
As adults, XXY males may have a harder time doing work that involves reading and writing, but most hold jobs and have successful careers.
As babies, XXY males tend to be quiet and undemanding.
The XXY condition can affect three main areas of development 1) physical, 2) language, and 3) social.
As babies, many XXY males have weak muscles and reduced strength.
This extra chromosome results in extra protein production and upsets the body’s balanced systems.
During pregnancy chromosomal abnormalities can cause the death of an embryo or fetus.
Klinefelter's Syndrome is a genetic disorder that happens in 1 in every 500 to 1000 male births.
The extra chromosome(s) results in a series of issues: Left Picture Klinefelter Syndrome Patient with Gynecomastia Right Picture 16 Months after Gynecomastia Surgery Learn more about this Klinefelter's Syndrome Patient's Gynecomastia Picture Before Gynecomastia Surgery 15 year old teenager with Klinefelter and gynecomastia under care of endocrinologist with testosterone therapy. He frequently lectures about Klinefelter's Syndrome and is on the Professional Advisory Board of the The American Association for Klinefelter Syndrome Information and Support (AAKSIS).
The human body has 23 pairs of chromosomes: 22 pairs of autosomes and 1 pair of sex chromosomes. Every chromosome contains hundreds to thousands of your genes.
Medically reviewed by Edward Spence, MD; American Board of Pediatrics and American Board of Medical Genetics with subspecialties in Clinical Genetics, Clinical Biochemical Genetics, Clinical Molecular Genetics SOURCE: National Institutes of Child Health and Human Development, National Institutes of Health What is menopause? Read more: Menopause Quiz: Symptoms & Signs Blood tests and ultrasound may be used to screen for Down syndrome but chromosome analysis of the fetus is needed to diagnose the condition.
People with Down syndrome age more quickly and may develop Alzheimer's disease as young as age 40.