Having children late in life runs a higher risk of Down's syndrome.

It has been suggested to be a new type of syndrome.

There are thought to be two types of the syndrome.

In other cases, the cause of the syndrome is unknown.

The effect of the syndrome on the child cannot be predicted.

Can occur in anyone, but often a sign of Down's syndrome.

From the start, many researchers have sought the cause of the syndrome.

Blood tests can also be used to estimate the risk of Down's syndrome.

He died at age 85 as a result of Parkinson's syndrome.

There is another report of the syndrome recurring after 18 years.