Final answer:
Children with Down syndrome may have a shortened life expectancy due to health conditions, intellectual disability, and advanced maternal age.
Step-by-step explanation:
Children with Down syndrome may have a shortened life expectancy for several reasons. One reason is that they are more susceptible to certain health conditions, such as congenital heart disease and cancer. Additionally, individuals with Down syndrome often have intellectual disability, which can affect their overall health and well-being. Finally, the risk of having a baby with Down syndrome is significantly higher among women age 35 and older, and advanced maternal age is associated with increased health risks for both the mother and the child.