"Iron is essential for the development of the central nervous system," said Parul Christian, an expert in international health at the Johns Hopkins University Bloomberg School of Public Health, whose study appears in the Journal of the American Medical Association.
"We had the opportunity to follow the offspring of women who had participated in a randomized trial of iron and folic acid and other micronutrients to assess neurocognitive function and outcomes," Christian said in a telephone interview.
"What we showed is prenatal iron and folic acid supplementation had a significant impact on the offspring's intellectual level and motor ability and ability during school age, which was a very exciting finding," she said.
"It had an impact across a range of function, including intellectual function, executive function and fine motor function," factors that could affect a child's later academic success, Christian said.