In the news today I have read that scientists in Australia have found a link between cerebral palsy and genetic mutation after 20 years of research.
https://au.news.yahoo.com/a/26274227/genes-may-cause-cerebral-palsy/
The report states:
A trial …has found that a large number of cerebral palsy cases are caused by a genetic mutation.
It challenges the long-held belief that the condition is caused by a lack of oxygen during pregnancy or at birth.
Now researchers have found at least 14 per cent of cerebral palsy cases are likely to have been caused by a genetic mutation
The research was carried out at the Robinson Institute, University of Adelaide.