Down Syndrome, known as Trisomy 21, is a genetic disorder caused by an extra chromosome 21. It affects facial appearance, developmental abilities, and overall health, with the risk increasing with ...

Down Syndrome Prevalence Incidence: 27.5 in 10,000 Ireland leads countries with the highest rate of Down syndrome, as its prevalence is 27.5 per 10,000 live births.

Study: The effects of mosaicism on biological and clinical markers of Alzheimer's disease in adults with Down syndrome.Image Credit: vitstudio/Shutterstock.com. In a recent study published in the ...

Down syndrome, also known as Trisomy 21, is a condition where people, by chance, are born with an extra chromosome and as a result have some form of learning disability.

To mark World Down Syndrome Day on March 21, Fox News contributor Tom Shillue headed to Times Square to speak with a father of a girl with Down syndrome about common misperceptions.