Frequency of Chromosomal disorders Among Live Born Infants
Autosomal Abnormalities
Trisomy 21 |
1 in 800 |
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Trisomy 18 |
1 in 5,000 |
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Trisomy 13 |
1 in 15,000 |
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Marfan syndrome |
1 in 10,000 |
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Sex Chromosomal Abnormalities
Klinefelter Syndrome (47,XXY) |
1 in 1000 males |
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XYY Syndrome (47,XYY) |
1 in 800 males |
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Turner Syndrome (45X or 45X/46XX or 45X/46XY) |
1 in 3000 females |
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Triple X syndrome (47,XXX) |
1 in 1000 females |
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