A genetic study has added to evidence that the increase in some mental disorders may be due to men having children later in life.
An Icelandic company found the number of genetic mutations in children was directly related to the age of their father when they were conceived.
One prominent researcher suggested young men should consider freezing their sperm if they wanted to have a family in later life.
The research is published in Nature.
According to Dr Kari Stefansson, of Decode Genetics, who led the research, the results show it is the age of men, rather than women, that is likely to have an effect on the health of the child.
Read more here:
http://www.bbc.co.uk/news/health-19336438
