0.04%
No.
93%
0-9 purcent
1 out of every 691 live births
1 in every 1,000 babies that is born. 1 is the Down syndrome and 1,000 is the people that dont.
down syndrome
Disorders, such as Down's Syndrome, are caused by nondisjunction.
Down syndrome is generally the preferred spelling, although Down's syndrome is sometimes used in American sources.
Down syndrome occurs in approximately 1 in 700 live births. Given California's population of around 39 million, the number of individuals with Down syndrome can be estimated to be around 0.14% of the population. However, exact percentages can vary based on specific demographics and reporting methods.
Most cases of down syndrome are not inherited. Translocation Down syndrome can be inherited.
Down syndrome IS the diagnosis.