Down's syndrome
Down's syndrome is the most common genetic disorder worldwide and affects 1 in 1000 babies born each year in the UK. Down's syndrome occurs when there is an extra copy of chromosome 21 in the body, three rather than two. This additional chromosome allows the range of developmental & physical characteristics that we associate with Down's syndrome. The term 'syndrome' means a group of characteristics, signs & features that often occur together.
Down's syndrome is named after English Doctor John Langdon Down who was the first doctor to recognize the syndrome in 1866. French Doctor Jerome Lejeune later discovered that Down's syndrome was caused by an an additional chromosome 21 in 1959.
We do not yet know what causes Down's syndrome but we do know that it affects people of all races, countries, religions, & economic backgrounds.
There are 3 types of Down's syndrome:
Trisomy 21 - occurs when all cells have an extra chromosome 21. Approximately 94% of people with Down's syndrome have Trisomy 21.
Translocation - is when the extra chromosome 21 material is attached to another chromosome and accounts for around 4% of people with Down's syndrome.
Mosaic - when only some of the cells have an extra chromosome 21. Around 2% of people with Down's syndrome have this type.
Williams Syndrome
Williams syndrome is a rare genetic disorder caused by the absence of the gene elastin & other genetic material from chromosome 7. It affects 1 in 10,000 babies born each year. Williams syndrome occurs unpredictably in an individuals DNA and affects people worldwide from all backgrounds, races and religions. Williams syndrome was discovered in 1961 by Dr. JCP Williams.
Genetic Disorders information provided by the University of UtahYou may find our recommended links usefulDiscover Nutrivene products for children with special healthcare needs 
