The researchers sequenced the DNA of parents and their children and found that the father's age was associated with mutations in the children's DNA, while the children's DNA of older fathers had mutations linked to autism and schizophrenia  As a result, the researchers concluded, men are more likely to have children as they age
The older a man is, the higher his child's risk of disease
Many of the couples were of the same age and the children were more likely to have mutations from older mothers.