Down Syndrome Causes, Symptoms and its Treatment & Prevention.

Epilepsy-Down Syndrome Foundation -
 Research into the dual diagnoses of Down syndrome and epilepsy. Emphasizes nutritional and non-medical interventions.
http://members.aol.com/dsepilepsy/org.htm

Growth Charts for Children with Down Syndrome -
 Charts included are for height, weight, and head circumferences. Printable.
http://www.growthcharts.com

Health Issues in Down Syndrome -
A collection of medical essays and abstracts for parents.
http://www.ds-health.com

Mayo Clinic: Down's Syndrome -
 A description of the disease plus complications, risk factors,
diagnosis and treatment.
http://www.mayoclinic.com/home?id=5.1.1.4.5

National Down Syndrome Cytogenetic Register (UK) -
Information about an anonymous register allowing researchers to analyse possible causal factors. Includes interpretation of the results.
http://www.mds.qmw.ac.uk/wolfson/ndscr/