In one study, four British universities measured the IQ of 900 11-year-olds

and revisited them 40 years later to see how their lives had moved on.

They found that the brighter girls were less likely to find a man who

wants to marry them, with their chances diminishing dramatically in

direct proportion to their level of intelligence.

For each 16-point rise in their IQ, their marriage prospects fell by 40 per cent.

In contrast, boys’ chances increased by 35 per cent with each 16-point rise. (Qtd. here).