These babies have more serious intellectual and developmental disabilities, including life-threatening issues that are present at birth, such as heart defects and other malformed organs. [baptisthealth.net]

Epidemiologic study of Down syndrome in a racially diverse California population, 1989-1991. Am J Epidemiol 1997;145:134-47. 4. Nazer J, Margozzini J, Rodriguez M, Rojas M, Cifuentes L. Disabling malformations in Chile. [revistabiomedica.org]

Because no one knows why these chromosomes develop abnormally, there’s no way to prevent the conditions they cause. [baptisthealth.net]

Center for Disease Control and Prevention. Down syndrome prevalence at birth-United States, 1983- 1990. MMWR Morb Mortal Wkly Rep 1994;43:617-22. 3. Bishop J, Huether CA, Torfs C, Lorey F, Deddens J. [revistabiomedica.org]