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Alternate Name(s): Trisomy 21 ...... Down syndrome is a chromosome abnormality, usually due to an extra copy of the 21st chromosome. This syndrome usually, although not always, results in mental retardation and other conditions.
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www.nlm.nih.gov/medlineplus/ency/article/000997.htm#Def...
www.nlm.nih.gov/medlineplus/ency/article/000997.htm#Definition
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National Down Syndrome Society is the main source of information ... Join the National Down Syndrome Society for the Buddy Walk® on Washington; February 24th and 25th, 2010...
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Down syndrome - Wikipedia, the free encyclopedia
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Down syndrome (the most common term in US English), Down's syndrome (standard in the rest of the English-speaking world), trisomy 21 , or trisomy G is a chromosomal disorder caused by the prese...
en.wikipedia.org/wiki/Down_syndrome
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Down Syndrome Connect - Building friendships, sharing information, asking questions, and providing answers and expertise ... History of Down Syndrome and Useful Information...
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www.downsyndrome.com/
www.downsyndrome.com/
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Down syndrome is a condition in which extra genetic material causes delays in the way a child develops, and often leads to mental retardation. ... The symptoms of Down syndrome can vary widely from child to child. While some kids with DS need a lot of medical attention, others lead very healthy and independent lives.
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kidshealth.org/parent/medical/genetic/down_syndrome.htm...
kidshealth.org/parent/medical/genetic/down_syndrome.html
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The Down Syndrome WWW Page was established in February of 1995 and was compiled from the contributions of members of the Down Syndrome Listserv and others.
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www.nas.com/downsyn/
www.nas.com/downsyn/
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Learn about Down syndrome, the most common cause of mental retardation. Diagnostic tests for Down syndrome include amniocentesis, chorionic villus sampling, and percutaneous umbilical cord sampling. ... home > healthy kids center > healthy kids a-z list > down syndrome index > down syndrome article...
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www.medicinenet.com/down_syndrome/article.htm
www.medicinenet.com/down_syndrome/article.htm
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