COLUMBUS, Ohio - Women who are obese before they become pregnant are at higher risk of having children with lower cognitive function - as measured by math and reading tests taken between ages 5 to 7 years - than are mothers with a healthy prepregnancy weight, new research suggests.
In this large observational study, prepregnancy obesity was associated, on average, with a three-point drop in reading scores and a two-point reduction in math scores on a commonly used test of children's cognitive function.
Previous research has suggested that a woman's prepregnancy obesity can have a negative effect on fetal organs, such as the heart, liver and pancreas. Because fetal development is rapid and sensitive to a mother's physiological characteristics, Ohio State University researchers sought to find out whether a mother's obesity also could affect the fetal brain.
"One way you measure the effects on the brain is by measuring cognition," said Rika Tanda, lead author of the study and a doctoral candidate in nursing at Ohio State.
The research also supported findings in previous studies suggesting that several other conditions affect childhood cognition, including how stimulating the home environment is, family income and a mother's education and cognitive skills.
"The new piece here is we have a measure associated with the fetus's environment to add to that set of potential risk factors," said Pamela Salsberry, senior author of the study and a professor of nursing at Ohio State. "If we have a good way to understand the risks each child is born with, we could tailor the post-birth environment in such a way that they could reach their maximum capabilities."
The research appears online and is scheduled for future print publication in the Maternal and Child Health Journal.
The researchers used data from the National Longitudinal Survey of Youth (NLSY) 1979 Mother and Child Survey, a nationally represent
|Contact: Pamela Salsberry|
Ohio State University