Down syndrome meaning: Down syndrome is a genetic condition where

Down syndrome is a genetic condition where a person has an extra copy of chromosome 21. It can affect their brain and body development and cause physical, cognitive and behavioral symptoms. Learn how to diagnose Down syndrome before or after birth. Down syndrome in hindi डाउन सिंड्रोम एक आनुवांशिक बीमारी है जिसमें बच्चे का जन्म 21 क्रोमोसोम की एक अतिरिक्त कॉपी के साथ होता है। जानिए डाउन सिंड्रोम के लक्षण, कारण, और इलाज के बारे में। Down syndrome (DS), also called Trisomy 21, is a condition in which extra genetic material causes delays in the way a child develops, both mentally and physically. Down syndrome is a condition in which a person has an extra chromosome or an extra piece of a chromosome. This extra copy changes how a baby's body and brain develop.