Skip navigation

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Down Syndrome

What is Down syndrome?

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. It can cause both mental and physical challenges during their lifetime. Even though people with Down syndrome might act and look similar, each person has different abilities.

What causes Down syndrome?

Chromosomes are tiny "packages" in your cells that contain your genes. Genes carry information, called DNA, that controls what you look like and how your body works. People with Down syndrome have an extra copy of chromosome 21. In some cases, they may have an extra copy of part of the chromosome. Having an extra copy of a chromosome is called trisomy. So sometimes Down syndrome is also called trisomy 21.

(Read more)

Results 1 - 10 of 1,938 for down syndrome
  1. Down Syndrome (National Library of Medicine)  
    What is Down syndrome? Down syndrome is a condition in which a person has an extra chromosome or an extra piece of a chromosome. This extra ... challenges during their lifetime. Even though people with Down syndrome might act and look similar, each person has ...
    https://medlineplus.gov/downsyndrome.html - Health Topics
  2. Down Syndrome Tests: MedlinePlus Medical Test 
    Down Syndrome Tests What are Down syndrome tests? Down syndrome is a condition in which a person is born with an extra chromosome or an extra piece of ... start a pregnancy. Why do I need a Down syndrome test? You may need Down syndrome testing during ...
    https://medlineplus.gov/lab-tests/down-syndrome-tests - Medical Tests
  3. Down syndrome 
    Down syndrome is a chromosomal condition that is associated with intellectual disability, a characteristic facial appearance, and weak ... disability is usually mild to moderate.People with Down syndrome often have a characteristic facial appearance that includes ...
    https://medlineplus.gov/genetics/condition/down-syndrome - Genetics
  4. Down syndrome 
    Down syndrome is a genetic condition in which a person has 47 chromosomes instead of the usual 46. ... In most cases, Down syndrome occurs when there is an extra copy of chromosome 21. This form of Down syndrome is called trisomy 21. ...
    https://medlineplus.gov/ency/article/000997.htm - Medical Encyclopedia
  5. National Down Syndrome Society (National Down Syndrome Society)  
    ... Are You? Join us NDSS empowers individuals with Down syndrome and their families by driving policy change, providing ... communities, and shifting public perceptions. Barbie dolls with Down syndrome Meet the Black Barbie doll with Down syndrome! ...
    https://ndss.org - Other Resources
  6. Nuchal translucency test 
    ... Measuring this thickness helps assess the risk for Down syndrome and other genetic problems in the baby. ... back of their neck. In a baby with Down syndrome or other genetic disorders, there is more fluid ...
    https://medlineplus.gov/ency/article/007561.htm - Medical Encyclopedia
  7. About Down Syndrome (National Down Syndrome Society)  
    Down Syndrome/Start Here ... Down Syndrome ... National Down Syndrome Society ... In every cell in the human body there is a nucleus, where genetic material is stored ...
    https://ndss.org/about - External Health Links
  8. Down Syndrome (For Parents) (Nemours Foundation)  
    Down Syndrome/Start Here ... Down Syndrome ... Nemours Foundation ... down syndrome, down's syndrome, genetic conditions, 3 copies of the 21st chromosome, genetic material, ...
    https://kidshealth.org/en/parents/down-syndrome.html - External Health Links
  9. Blood Diseases and Down Syndrome (National Down Syndrome Society)  
    Blood Diseases & Down Syndrome
    https://ndss.org/resources/blood-diseases-syndrome - External Health Links
  10. About Down Syndrome From the National Institutes of Health (National Human Genome Research Institute)  
    Down Syndrome/Genetics ... Down Syndrome ... National Human Genome Research Institute ... From the National Institutes of Health ... Down syndrome is a chromosomal condition ...
    https://www.genome.gov/Genetic-Disorders/Down-Syndrome - External Health Links
previous · 1 · 2 · 3 · 4 · 5 · 6 · 7 · 8 · 9 · 10 · next