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.

Down syndrome, which causes a range of developmental differences and affects 1 in 700 newborns in the United States, is caused by the presence of an extra copy of chromosome 21. Mongkolchon ...

Scientists have diagnosed Down syndrome from DNA in the ancient bones of seven infants, one as old as 5,500 years. Their method, published in the journal Nature Communications, may help ...