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  2. Down Syndrome - Symptoms, Causes, Diagnosis and Treatment ...

    Down syndrome is a lifelong condition in which a person is born with distinct physical features and some degree of cognitive disability.

  3. Down syndrome - Wikipedia

    Down syndrome (DS or DNS), also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21. It is typically ...

  4. Down syndrome - Symptoms and causes - Mayo Clinic

    Down syndrome is a genetic disorder caused when abnormal cell division results in extra genetic material from chromosome 21.

  5. What Is Down Syndrome? Facts, Causes, Symptoms

    Down syndrome is a condition caused by chromosome replication errors. A baby born with Down syndrome may have symptoms such as unusual facial features, low IQ, and ...

  6. Down syndrome - Genetics Home Reference

    Down syndrome is a chromosomal condition that is associated with intellectual disability, a characteristic facial appearance, and weak muscle tone (hypotonia) in infancy.

  7. Down Syndrome: MedlinePlus

    About 1 in 700 babies are born with the birth defect known as Down Syndrome. Learn about the different Down Syndrome types and related health issues.

  8. The leading human rights organization for all individuals with Down syndrome.

  9. Down Syndrome | Birth Defects | NCBDDD | CDC

    Down syndrome is a condition in which a person has an extra chromosome. Chromosomes are small “packages” of genes in the body. Babies with Down syndrome have an ...

  10. Down syndrome: Causes, symptoms, and diagnosis

    Down syndrome is a chromosomal disorder caused by an error in cell division. Children born with it will have special characteristics.

  11. Down Syndrome: Trisomy 21 - Causes, Symptoms and Risks

    Down syndrome aka trisomy 21 is the most common birth defect in the United States. Learn more about the causes, symptoms and risks of Down Syndrome.

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