Fish consumption was also associated with rapid infant growth between birth and two years of age.
The research, published in the journal JAMA Pediatrics, studied 26,184 pregnant women and their children in Europe and US.
Of the children studied, 3,476 (15.2 percent) were overweight or obese at ages four and six.
High fish consumption increased the risk of a child being overweight or obese at four years old by 14 percent and at six years old by 22 percent.
The effects were generally greater in girls than in boys. In girls, eating fish more than three times a week was associated with a 31 percent increased risk of rapid growth early in childhood.


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