Age
- A study published in the Archives of General Psychiatry reveals that men over 40 are six times more likely to father a child with autism than men aged 15 to 29. [Ref]
- A French study of over 12,200 couples having fertility treatment suggests the chance of a successful pregnancy falls when the man is aged over 35. It adds that the chance is significantly lower if he is over 40. [Ref] The heaviest men had a higher proportion of abnormal sperm, as well as other problems. [Ref]