Final answer:
The probability of having a child with Down's syndrome increases with the age of the parents.
Step-by-step explanation:
True, the probability of having a child with Down's syndrome increases with the age of the parents. Research shows that the risk of having a child with Down's syndrome is significantly higher among women aged 35 and older. This is because as women age, the chance of having a baby with a chromosomal abnormality, such as Down's syndrome, increases due to an increase in the nondisjunction of cells during cell division. The risk is associated primarily with age, not with lifestyle factors.