PLoS Medicine - Advanced Paternal Age Is Associated with Impaired Neurocognitive Outcomes during Infancy and Childhood
Not sure I can make sense of this research. It seems to contrast the positive effects of having an older mother with the negative effects of having an older father, without clearly saying what happens if you have both. Well, it wasn't clear to me anyway in the 60 seconds I had to read the summary. Decide for yourself.
Anyway it says the negative effects are subtle and it is not clear what happens in the years from age 8 and beyond.
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There are many paternal age effects found on a population level due to de novo problems (mutations) in sperm that come with ageing. See the Wikipedia article on the paternal age effect. This research field is not new.
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