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Down syndrome - Symptoms and causes - Mayo Clinic Down syndrome is a genetic condition caused when an unusual cell division results in an extra full or partial copy of chromosome 21 This extra genetic material causes the developmental changes and physical features of Down syndrome The term "syndrome" refers to a set of symptoms that tend to happen together
Down Syndrome - NICHD - Eunice Kennedy Shriver National Institute of . . . Understanding Down syndrome and other intellectual and developmental disabilities is part of the reason NICHD was established Today, the institute continues to lead research on the causes, progression, treatment, and management of Down syndrome, as well as on conditions and diseases that are associated with the syndrome
Down syndrome - Diagnosis and treatment - Mayo Clinic A physical exam is usually enough to identify Down syndrome in an infant in the first 24 hours after birth If your healthcare professional thinks that your infant has Down syndrome, your healthcare professional orders a test called a chromosomal karyotype to confirm the diagnosis Using a sample of blood, this test looks at your child's
What are the symptoms of Down syndrome? - NICHD The symptoms of Down syndrome vary from person to person, and people with Down syndrome may have different problems at different times of their lives
Down Syndrome - Eunice Kennedy Shriver National Institute of Child . . . Down syndrome is a set of cognitive and physical symptoms that result from having an extra chromosome 21 or an extra piece of that chromosome It is the most common chromosomal cause of mild to moderate intellectual disabilities People with Down syndrome also have some distinct physical features, such as a flat-looking face, and they are at risk for a number of other health conditions
What causes Down syndrome? | NICHD - NICHD - Eunice Kennedy Shriver . . . Sometimes, a parent who does not have Down syndrome may carry a translocation in chromosome 21 that can be passed on to children and cause Down syndrome Studying the parents’ chromosomes can reveal whether this is the cause of the syndrome
How do health care providers diagnose Down syndrome? How do health care providers diagnose Down syndrome? Health care providers can check for Down syndrome during pregnancy or after a child is born There are two types of tests for Down syndrome during pregnancy: A prenatal screening test