Down syndrome

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Trisomy 21

Genetic counseling is recommended in all families with Down syndrome. Down syndrome can be detected in a fetus in the first few months of pregnancy by examination of the chromosomes obtained by amniocentesis or chorionic villus sampling. The parents of a child with Down syndrome are at increased risk for having another child with Down syndrome. Mothers who become pregnant after age 40 are also at increased risk for having a child with Down syndrome.

Review Date: 04/20/2005
Reviewed By: Neal Sondheimer, M.D., PhD., Division of Genetics and Metabolism, Children's Hospital of Philadelphia, Philadelphia, PA. Review provided by VeriMed Healthcare Network.