Down Syndrome Medline Plus - Down Syndrome http://www.nlm.nih.gov/medlineplus/ency/article/000997.htm Down syndrome http://www.nlm.nih.gov/medlineplus/ency/article/000997.htm MedlinePlus Medical Encyclopedia: Down syndrome Down syndrome Down syndrome Medline Information www.nlm.nih.gov Trisomy 21, Downs Syndrome Encyclopedia: Down Syndrome http://www.nlm.nih.gov/medlineplus/ency/article/000997.htm Down syndrome Down syndrome Down Syndrome Down syndrome www.nlm.nih.gov Down syndrome MedlinePlus Medical Encyclopedia: Down syndrome www.nlm.nih.gov www.nlm.nih.gov Down Syndrome Trisomy 21 (Down Syndrome) Down syndrome Down syndrome Down syndrome Down syndrome Down syndrome Down syndrome Down Syndrome Down syndrome Down syndrome www.nlm.nih.gov Down Syndrome Down syndrome Trisomy 21 (Down Syndrome) Down Syndrome www.nlm.nih.gov Down syndrome Down syndrome Down syndrome Down syndrome Down Syndrome Down syndrome Down syndrome Down syndrome Down syndrome Trisomy 21 (Down Syndrome) Down syndrome Down syndrome Down syndrome Trisomy 21, Downs Syndrome Down syndrome Down Syndrome Down Syndrome Down syndrome http://www.nlm.nih.gov/medlineplus/ency/article/000997.htm Down syndrome Down syndrome http://www.nlm.nih.gov/medlineplus/ency/article/000997.htm Down syndrome Down syndrome Full article >>> Trisomy 21 (Down Syndrome)