Ethnic differences in folic acid supplement use in a population-based cohort of pregnant women in Norway

Peri-conceptional use of folic acid supplements is recommended to prevent neural tube defects. Correct supplement use seems to be less common among ethnic minorities. We examined ethnic differences in folic acid supplement use before and during pregnancy and possible effect modification by education or planning of pregnancy. The participants were 811 healthy pregnant women from a population-based cohort study in Oslo, Norway in 2008–2010....