Experts: Older moms reason for Down syndrome increase

December 1, 2009 The overriding reason, experts say, is that more older women are having babies. Experts say there is a strong epidemiological association between Down syndrome and maternal age.

Recent data from birth registries shows the incidence of Down syndrome among US children increased by 31 percent between 1979 and 2003. The report, published online in the journal Pediatrics, provides a benchmark for determining whether adequate health services for them are being provided.

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