A. The following groups of parents are at greatest risk for having a child with this genetic disorder: parents who have already had a baby with Down syndrome, mothers or fathers who have an anomaly involving chromosome 21, and mothers over 35 years old.
For more information about Down syndrome, call the U-M Womens Health Resource Center at (734) 936-8886, or go to Your Child at www.med.umich.edu/1libr/yourchild/downsyn.htm.