The probability of a child's being born with Down syndrome increases with
A) alcohol or drug abuse.
B) poor maternal prenatal care.
C) the age of the parents.
D) low socioeconomic status.

Question

Quizplus · Accepted Answer

The probability of a child's being born with Down syndrome increases with the age of the parents. As women age, the chances of having a baby with Down syndrome increase, with the risk being highest in women who are 35 years or older at the time of conception.

The Probability of a Child's Being Born with Down Syndrome