How common is down syndrome?

How common is Down syndrome?

• Answer:

  The incidence, however, increases dramatically with increasing maternal age. If you look at the link below, under about age 30, there is a 1:1000 chance in having a child with Down syndrome, however, at age 40, there is about a 1:100 chance. This increases to 1:10 by age 50. 80% of all children with Down syndrome are born to women under the age of 30, however, because women of this age group have children at a much higher rate than those over 30. Approximately 1 in 800-1,000 babies are born with Down syndrome. The overall incidence of Down's syndrome is 1 in 660 newborns, thereby making it the most common pattern of malformation in man. According to scientific data, Down syndrome occurs in 1 out of every 750 births.