The chance to have a child with Down syndrome (due to trisomy 21) increases as a woman gets older. To use this chart, look at the age you will be at the time of delivery and read across. The first number is your risk to have a child with Trisomy 21 and the second number is your risk to have a child with any trisomy.
Maternal Age Related Risks to have a Child with Down Syndrome or Other Trisomies
Your risk to have a child with Down syndrome based on your age.
From Kathleen Fergus, former About.com Guide
Updated March 06, 2009
About.com Health's Disease and Condition content is reviewed by the Medical Review Board
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