Down syndrome occurs when a baby develops an extra copy of the 21st chromosome during pregnancy, resulting in telltale symptoms. These distinctive signs and symptoms can include recognizable facial ...

Medically reviewed by Nicholas R. Metrus, MD Key Takeaways Mosaic Down syndrome has some cells with three copies of chromosome 21, and some with two instead of all three.Only about 1% to 2% of people ...

A child born with this condition has extra genetic material caused by abnormal cell division. This results in an extra full or partial copy of chromosome 21. There are three types of Down syndrome, ...

Puerto Rico's Sofía Jirau became the first Victoria's Secret model with Down syndrome earlier this month – a welcome moment of disability inclusion. People with Down syndrome have an extra chromosome ...

Many adults with Down syndrome live independently, hold jobs, and lead full and happy lives. Learn how the condition affects their growth, development, and adulthood.

It's a ban that even supporters acknowledge will be hard to enforce. Yet 2021 has been a breakthrough year for legislation in several states seeking to prohibit abortions based solely on a prenatal ...