Researchers from Columbia University say raising three or more children could activate dementia later in life. Having that many kids effectively makes you 6.2 years older.
It would be interesting to see how that breaks down between men and women in the traditional nuclear household, given we already know it doesn't matter the amount of money they make or how many children there are, women tend to take on the majority of the household work. But we'll save that for the smart scientists. All we know is the more kids, the more mental degradation.
Except yours, though. Your kids are different. lol