What is Down syndrome

Patient's question:

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Doctor's answer:

Down syndrome, also known as 21-trisomy syndrome, congenital idiocy, or Down syndrome, is a disease caused by chromosomal abnormalities (having an extra 21 chromosome). 60% of affected fetuses abort in the early stages of pregnancy, and survivors exhibit significant intellectual disability, distinctive facial features, growth and development disorders, and multiple congenital anomalies.