We have a long history in this culture of blaming mothers for children with problems.
Is your child autistic? Ah, mother did not create a healthy atmosphere of attachment.
Is your child schizophrenic? Ah, mother was abusive or emotionally cold.
Is your child overactive and aggressive? Ah, mother was too permissive.
Does your child have a chromosomal anomaly? Ah, mother was foolish enough to have a baby when she was way too old.
Such finger pointing is why
the recent discovery that older fathers are more at risk of having a child with autism, schizophrenia and other mental and physical disorders is so interesting (and in an odd way for women, satisfying).
The research overturns every assumption about risks of conception by older parents because it shows that the chromosomes in sperm, rather than eggs, are more likely to experience mutations. It turns out that the eggs women produce have constant, and rather low, rate of mutation at any age while the rate of such mutations increases steadily with age for men and their sperm.
It's a kind of genetic change that most people don't think about. Older fathers don't exhibit any of the conditions such as autism, nor do their ancestors, but their sperm mutate and pass along those mutations at conception. Most of these mutations are harmless, but many affects brain function.
The old adage than men can reproduce successfully at any age is simply wrong. As is the adage that women are nuts to make babies past the age of 30.
This information also touches broader cultural images, such as the old geezer with the young woman looking as if he owned the keys to the reproductive kingdom. Be careful out there ladies.