The incidence of a child being born with Down syndrome to a mother at age 35 is 1 in 500 births.The risk at maternal age 45 is 1 in ___ births.
A) 1,000
B) 500
C) 100
D) 18

Name: The incidence of a child being born with Down syndrome to a mother at age 35 is 1 in 500 births.The risk at maternal age 45 is 1 in ___ births. A) 1,000 B) 500 C) 100 D) 18
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The incidence of Down syndrome increases with maternal age, and at age 45, the risk is 1 in 18 births.

The Incidence of a Child Being Born with Down Syndrome