Diabetes may cut male fertility

Tests showed DNA in sperm from diabetic men had more signs of damage than in men without the condition. Around 52% of the DNA in the sperm cells was fragmented in diabetic men compared with 32% in men without the condition. The study also found a higher rate of deletions of DNA in the mitochondria - tiny, energy-generating compartments found within cells. Semen volume was significantly less in diabetic men, but there were no significant differences in sperm concentration, structure of the sperm or their ability to move.

http://news.bbc.co.uk/2/hi/health/6615261.stm