Niven /niv-en/ [2 sylls.] as a boys' name. Niven's root is Latin, and the name Niven means holy, sacred; little bone; servant of the saint's disciple. Niven is a variant transcription of Nevin (Latin).
The average life expectancy for someone with MS is 35 years after the symptoms begin. This represents a life expectancy of 95 percent of someone who does not have multiple sclerosis. Most people with the disease can function effectively; however, a rare form of acute MS can be fatal within weeks.
Down Syndrome Prognosis. The life expectancy for people with Down Syndrome has increased substantially. In 1929, the average life span of a person with Down Syndrome was nine years. Today, it is common for a person with Down Syndrome to live to age 50 and beyond. In addition to living longer, people with Down Syndrome are now living fuller, richer lives than ever before as family members and contributors to their community.