What is Down syndrome?

Trisomy 21, the most common type of Down syndrome, occurs when there are three, rather than two, number 21 chromosomes present in every cell of the body. Instead of the usual 46 chromosomes, a person with Down syndrome has 47. It is this additional genetic material that alters the course of development and causes the characteristics associated with the syndrome.

Today, with early intervention, quality medical care, education programs and social acceptance, people with Down syndrome can live full, productive lives.