Read more about the article Chromosomal Abnormalities

Chromosomal Abnormalities

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Chromosomal abnormalities are a very common cause of spontaneous miscarriage. Most commonly a child with a chromosomal abnormality will not survive to birth. However, there are many cases where the…

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XXX Females

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Approximately 0.1% of females have an extra X chromosome. It is likely that there will be no clinical features, however, some studies suggest that: intelligence is typically reduced by 10-20…

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XYY Males

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Very similar to XXX in females. The incidence is again about 1 in 1000. They may have slightly reduced intellectual ability (10-20 IQ points), and a tendency for aggressive and…

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