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Celebrities with mosaic down syndrome4/10/2024 ![]() Some estimates put the worldwide population of people with Down syndrome at more than 6 million. Thus, we don’t actually know how many people with Down syndrome currently live in the U.S.4. Unfortunately, this technique takes no account of the gradual increase in frequency or the increase in lifespan of people with Down syndrome. has been estimated to be over 400,000. However, this number is derived from faulty assumptions – the total population from the 2000 US census, 281.4 million people, divided by the most current frequency of live births, 691 equaling 407,236. The population of people with Down syndrome in the U.S.Because of the increase of live births of people with Down syndrome and the recent dramatic increase in their lifespan, over the next 20 years a significant increase in the population of people with Down syndrome in the U.S.38% of Americans know someone with Down syndrome.Surprisingly, The population of people in the US with Down syndrome is currently unknown. What we do know is: ![]() ![]() A more targeted 2012 review of just United States data and termination rates following a prenatal diagnosis for Down syndrome estimates termination rates from 1995 – 2011 were about 67%.ģ.This statistic is based on studies done that merged findings from the U.S., UK and Europe in the mid- to late 1990s. The numbers do not represent the attitudes of the US population then or today.who get a diagnosis of Down syndrome through amniocentesis choose to terminate IS INACCURATE. The estimate that 90% of pregnant women in the U.S. The Centers for Disease Control (CDC) in 2011 estimated the frequency of Down syndrome in the US is 1 in 700 live births ( up from 1 in 1087 in 1990)Ģ. What is the population of people with Down syndrome?ġ. In the case of hereditary Translocation Down syndrome (a rare one to two percent of all people with Down syndrome), an extra chromosome 21 is inherited from one of the parents. Translocation happens when a piece of chromosome 21 becomes attached to another chromosome during cell division. Between two and four percent of the time, a person is born with Mosaic translocation Down syndrome (mDs) whereby some but not all of the cells have an extra copy of the 21 st chromosome and the other cells are not affected. There is NO correlation between incest and Down syndrome.ĥ. Down syndrome has nothing to do with race, nationality, socioeconomic status, religion, or anything the mother or father did during pregnancy.Ĥ. The chance of having a baby with Down syndrome increases with the mother’s age however, about half of babies born with Down syndrome are born to mothers under 35 years old simply because more young women are having babies.ģ. The cause of this non-disjunction remains unknown.Ģ. When this egg is fertilized, the resulting baby ends up with three copies of chromosome 21 in each of its cells. In a process called non-disjunction, the two copies of chromosome 21 fail to separate during formation of the egg, resulting in an egg with two copies of the chromosome.Down syndrome is the most frequently occurring chromosomal disorder and the leading cause of intellectual and developmental delay in the U.S. There are also very rare forms of Down syndrome (less than 6%) called Translocation Down Syndrome or Mosaic Down Syndrome in which not all of the chromosome is triplicated or not all cells of the body carry the extra chromosome. ![]() Jerome Lejeune discovered Down syndrome is a genetic disorder whereby a person has three copies of chromosome 21 instead of two. Down syndrome is named after the English doctor, John Langdon Down, who was the first to categorize the common features of people with the condition.Ģ. What are the hurdles? Facts about Down syndrome: What is Down syndrome?ġ. What is the future for a person with Down syndrome in the U.S.? You are pregnant – What if your doctor offers a prenatal test to see if your baby has Down syndrome? How will a baby with Down syndrome affect my family? How do medical issues and care affect people with Down syndrome? What should you know about people with Down syndrome in the U.S.? What is the population of people with Down syndrome? The Global Down Syndrome Foundation is committed to funding medical and basic research that will provide answers to the many questions that remain. Because of this, and because of lack of funding from other government organizations, there is surprisingly little known definitively about the condition. In the U.S., Down syndrome is the least funded major genetic condition by our National Institutes of Health despite being the most frequent chromosomal disorder.
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