Trisomy X
Trisomy X or Triple X syndrome refers to a condition where a female's cells contains one extra X chromosome. Some women with this condition only have the trisomy in some of their cells, which is called 46 XX/47 XXX mosaicism. Trisomy X affects approximately 1 in 1000 newborn girls, but normally has very few, if any, adverse effects on the child's life. The only physical manifestation of this condition is tall stature, with no related risk of reproductive issues, however there is some risk of mild learning and speech difficulties[1]. Throughout the girl's life its progress would be monitored to ensure that development is continuing as expected, with regular check ups from infancy to childhood, followed by less regular, normally annual, assessments once adulthood is reached.
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References:
- ↑ Linden, M. G., Bender, B. G. and Robinson, A. (2002), Genetic counseling for sex chromosome abnormalities. Am. J. Med. Genet., 110: 3–10. doi: 10.1002/ajmg.10391fckLRfckLRResearch article detailing findings on various sex chromosome abnormalities.