Sign up for emails from Pathways.org
355 E Erie St. • Chicago, IL 60611 • (800) 955-2445
Our new FREE mobile app lets you track baby's milestones and see games to play to help reach those milestones. Download Today!
Donate
A genetic disorder caused by the presence of a third copy of all or part of chromosome 21. It is typically associated with delays in physical and intellectual development.