Is down syndrome more common in certain populations?

Down syndrome occurs in all populations, but there are some populations where it is more common. Studies have suggested that the risk of having a child with Down syndrome increases with advancing maternal age, and this risk is higher in women who are 35 years of age and older. Additionally, certain genetic factors, environmental factors, and certain populations have been identified as having a higher prevalence of Down syndrome. Some studies suggest an increased risk of Down syndrome in certain ethnic and geographic populations, such as African Americans and Hispanic Americans, and in certain regions of the world, including Europe, North America, and Asia. However, it's important to note that these variations are relatively small and that Down syndrome can affect individuals of any ethnicity or geographic background.