Interesting article over at BBC News. The interesting takeaway from it all is this list comparing children of fathers 24 years old with those 20 years older:

• autism was more than three times as likely
• a 13-fold increased risk of ADHD
• double the risk of a psychotic disorder
• 25 times more likely to have bipolar disorder
• 2.5 times more likely to have suicidal behaviour or problems with drugs
• lower scores at school

Now that is quite an impact.