Down syndrome (trisomy 21)
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Down syndrome (trisomy 21) is widespread: worldwide approximately one affected by 700 newborns, so every few minutes a baby with this congenital disorder to the world. Here, people of all races, nationalities and social classes equally represented.
reason Down's syndrome is a Change the genetic material - more precisely, to the number of thread-like structures that carry the genetic material (so-called chromosomes.). The affected cells not - as usual - 23 Chomosomenpaare but an extra chromosome. The reason: The entire chromosome 21 or a portion thereof is not twice, but triple available. This chromosomal abnormality called trisomy 21.
The probability of giving birth to a Down syndrome baby increases with maternal age. In Germany it can Pregnant aged 35 and over her unborn child as part of the prenatal Diagnosis be tested for trisomy 21 down.
Some of these symptoms may occur without trisomy 21 in humans. However, the common occurrence of the different signs is kennzeichend for Down syndrome.
In addition to the external characteristics other symptoms of Down syndrome occur, including both physical and mental abnormalities: Trisomy 21 ...
Nevertheless, the life quality and Life expectancy of people with Down syndrome in recent decades clearly gone up - both thanks to the possible today treat the resulting illnesses and through intensive promotion opportunities and a more comprehensive understanding of the syndrome in the population