Triple X
syndrome is a genetic
condition in which 1 of 800 human
females are found to have an extra X chromosome (they usually have two). This condition is also known as Jacob syndrome, superfemale syndrome, and XXX syndrome. The majority of females with the extra X never know that they have an extra X chromosome, and the condition is not passed down from mother to daughter. Infants with
Triple X syndrome may have a low birth weight, but initially there are few other physical symptoms of the condition. As these girls get older, they may have
developmental delays in motor function, speech and language, and social skills and maturation. Triple X females tend to be tall and may have loose folds of skin, called webbing, on the neck. Most triple X females are fertile; however, as they age, some may enter menopause earlier than most women. There is no specific treatment for triple X syndrome, but if the condition is diagnosed at an early age, the affected girl can receive extra help with any developmental delays.
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