Fragile X Syndrome - causes, symptoms, diagnosis, treatment, pathology
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Fragile X Syndrome
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Triple X syndrome
Triple X syndrome, also known as trisomy X and 47,XXX, is characterized by the presence of an extra X chromosome in each cell of a female. Those affected are often taller than average. Usually there are no other physical differences and normal fertility. Occasionally there are learning difficulties, decreased muscle tone, seizures, or kidney problems.