Down’s syndrome is a genetic condition caused by the presence of an extra chromosome in the baby’s cells.
Chromosomes are tiny particles which are present in every cell in every tissue of our bodies. Most people have two copies of all chromosomes but people who have Down’s syndrome have three copies of chromosome 21. That's why Down’s syndrome is sometimes referred to as Trisomy 21.
People who have Down’s syndrome are born in every country in the world to parents of all ages and socio-economic backgrounds.
Anyone can have a child who has Down’s syndrome. Nothing done before or during pregnancy causes the condition.
In Ireland, approximately 150 children are born each year with Down’s syndrome.