1FFQ = Food Frequency Questionnaire; 2SD = standard deviation; 3IQ range = interquartile range, 25–75 percentiles; 4CI = 95% confidence interval; 55–95 percentile range; 6observed range; 7RDA for women of reproductive age. No specific recommendation for pregnant women; they are recommended oral iron supplements. AR = Estimated Average Requirement; daily intake levels estimated to meet the needs of half of the healthy pregnant women. DRI = Dietary Reference Intake; nutrition recommendations from the Institute of Medicine of the National Academies (USA). RDA = Recommended Dietary Allowance; daily intake adequate to meet the nutrient requirements of nearly all (97%–98%) healthy pregnant women. RNI = Reference Nutrient Intake; daily intake adequate to meet the nutrient requirements of nearly all (97.5%) healthy pregnant women.