What is the Likelihood of Having a Child with Down Syndrome?
Down syndrome occurs in people of all races and economic levels, though older women have an increased chance of having a child with Down syndrome. A 35 year old woman has about a one in 350 chance of conceiving a child with Down syndrome, and this chance increases gradually to 1 in 100 by age 40. At age 45 the incidence becomes approximately 1 in 30. The age of the mother does not seem to be linked to the risk of translocation.
- See more at: http://www.ndss.org/Down-Syndrome/What-Is-Down-Syndrome/#sthash.W0zxa7rs.dpuf