Currently we can't predict how babies with mosaic or partial forms of Patau's syndrome will be affected. This is because it depends on:
- how many cells contain the extra chromosome (mosaic)
- how much of the extra chromosome they have (partial)
Some babies may have severe health problems like those seen in full form Patau's syndrome. Other babies may have much less serious health issues. There are even cases where the baby seems to have no health issues at all.
Most babies with a form of Patau's syndrome will have some form of learning disability.
The life expectancy for babies with mosaic or partial forms of Patau's syndrome is also very variable. Some will live long lives, while others will have a much shorter life expectancy.