The primary factor associated with the risk of Down syndrome is

Name: The primary factor associated with the risk of Down syndrome is
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Advanced maternal age is associated with Down syndrome in the most common form of the disease.A family history of heritable disease is not the primary factor and occurs in only 4% of cases.Exposure to TORCH syndrome organisms is not a risk factor for Down syndrome.Maternal alcohol intake is not a risk factor for Down syndrome.

The Primary Factor Associated with the Risk of Down Syndrome