Children with fathers in their 50s performed just as well in school as children born to fathers in their 30s, according to a Swedish study in PLoS ONE. Researchers found that children with fathers younger than 30 years old had a slightly lower school performance than other children. The results, which were based on the school performance of more than 135,000 children in Stockholm, contradict previous studies claiming older paternal age negatively affects children's intelligence.

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