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Down syndrome or Down's syndrome, [12] also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21. [3] It is usually associated with developmental delays, mild to moderate intellectual disability , and characteristic physical features.
This template may be used to display a person's or entity's whole lifespan in years, and optionally their final age or duration, also in years; the Gregorian calendar and AD/CE era are respectively, the implied default calendar and editable default era. Astronomical dates are not specifically handled; negative years are not allowed, but year '0' (zero) may be used when applicable. All date ...
According to the Centers for Disease Control, each year about 6,000 babies are born with Down syndrome, making it the most common chromosomal disorder. That's about 1 in every 700 newborns. That's ...
The life expectancy in some states has fallen in recent years; for example, Maine's life expectancy in 2010 was 79.1 years, and in 2018 it was 78.7 years. The Washington Post noted in November 2018 that overall life expectancy in the United States was declining although in 2018 life expectancy had a slight increase of 0.1 and bringing it to ...
1949. Overall life expectancy: 68 Women: 70.7 Men: 65.2 1949 marked the first year women’s life expectancy eclipsed 70 — a milestone men would not reach for another three decades.
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The average IQ of a young adult with Down syndrome is 50, equivalent to the mental age of an 8- or 9-year-old child, but this number varies widely. [3] At the same time, they enjoy a rich social and emotional awareness. [4] Down syndrome is the most common chromosome abnormality in humans, [3] occurring in about one per 1000 babies born each ...
Karyotype of a human with Trisomy 21 (Down syndrome). Trisomies can occur with any chromosome, but often result in miscarriage rather than live birth.For example, Trisomy 16 is most common in human pregnancies, occurring in more than 1%, but the only surviving embryos are those having some normal cells in addition to the trisomic cells (mosaic trisomy 16). [3]