The prevalence of disease statistics showed that the number of cases with Down's syndrome increased by 71%, the reported number of cases in 1989-90 was 1,075, and the number of cases in 2007-8 increased to 1,843. One of the main reasons why the number of people with Down's syndrome has increased is that women are more specialized and families come later. Compared to a 25 - year - old female, a 40 - year - old female has a 16% chance of developing Down 's syndrome.
Among all ethnic and economic individuals, one out of 900 newborns has a hereditary disorder and Down's syndrome may exist. In fact, Down's syndrome is the most common chromosomal abnormality seen in neonates. In the United States, more than 350,000 people suffer from Down's syndrome. There are several reasons why Down's syndrome may be difficult, but the most important thing is the various health problems related to that condition. People with Down's syndrome are more likely to experience congenital heart failure, dyspnea, high risk of infection, and digestive system diseases. Some associate Down's syndrome with mental disorders, but most people have experienced only mild to moderate effects in this area.
Down syndrome (Down syndrome) is a hereditary disorder that can cause some degree of learning disability and unique physical characteristics. There are three types of Down Syndrome, and I will tell them separately as trisomy 21, translocation and mosaic. These are chromosomal variations that cause Down's syndrome. Down syndrome is a chromosomal abnormality caused by cell division abnormality. This is a person who has three copies of chromosome 21 instead of two normal copies. This disease causes disorders of mental and physical development, ranging from mild to moderate developmental disorders.
Chromosomal abnormalities are caused by excess or loss of genes on the chromosome or structural changes within the chromosome. (Refer to the NHGRI fact sheet for chromosomal aberrations; for example Down's syndrome (called trisomy 21) caused by extra copies of chromosome 21. There is no single genetic abnormality on the chromosome, while Prader- Willi syndrome Certain forms of hematologic cancers (chronic myeloid leukemia, CML) are caused by chromosomal translocation, where two parts of the chromosome (exchanging with chromosome 9, without chromosomal material.) Acquired or lost, And formed a new abnormal gene causing formation