Low muscle tone and hearing problems can also cause a delay in language development. There are several health concerns attributed to Down Syndrome. Sixty to Eighty percent of children with DS have hearing deficits. Forty to forty-five percent of the children have congenital heart disease. Many have to undergo surgery.
Intestinal abnormalities is common.
Eye problems are at a higher incidence in children with Down Syndrome. Nutrition can be a problem as well. In the infant with a heart defect, failure to thrive can be a problem. In adolescence and adulthood obesity often occurs. There are often thyroid dysfunctions.