CDC Down Syndrome overview
A concise reference for chromosome 21, the three types, and screening versus diagnosis.
What this resource offers
Use this page to review the basic genetic explanation and why screening is not the same as diagnosis.
Helpful questions for your next conversation
- Which terms in the page should we ask our clinician to explain?
This is an external CDC learning page; ALBE summarizes it and does not claim CDC endorsement or translation review.
Every person’s needs and journey are different. Use this information to support a conversation with a qualified professional, not as a substitute for personalized advice.
