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While animal studies have shown low-fibre diet during pregnancy to impair brain nerve function in offsprings, this study is the first one to find the same effects in humans, researchers said.
”Our results provided reinforcing evidence that undernutrition during pregnancy is associated with an increased risk of neurodevelopmental delay in children,” said Kunio Miyake, a researcher at the University of Yamanashi and first author of the study published in the journal Frontiers in Nutrition.
When compared to children of mothers in high-fibre intake groups, children of mothers in low-fibre intake groups were more likely to exhibit neurodevelopmental delays, Miyake and team found after analysing more than 76,000 mother-infant pairs from the Japan Environment and Children’s Study. It is an ongoing project aimed at highlighting how the environment affects children’s health.
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The scientists collected the participants’ dietary information using a food frequency questionnaire, where the mothers were asked about the diet they consumed in the second and third trimester of their pregnancy.
Children’s developmental progress was assessed through another questionnaire sent to parents upon the offsprings turning three years old. Based on the parents’ responses, the scientists correlated maternal fibre intake with child brain development.
The recommended daily dietary fibre intake is 18 grams each day in Japan, while it is 28 grams in the US and Canada.
”Our results show that nutritional guidance for pregnant mothers is crucial to reduce the risk of future health problems for their children,” said Miyake.
The researchers also pointed to certain limitations of their study.
”Although this study considered the impact of folic acid intake during pregnancy, the possibility of other nutrients having an impact cannot be completely ruled out,” Miyake pointed out.
”In addition, dietary fibre intake from supplements could not be investigated,” Miyake said.