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### DIETARY REFERENCE INTAKES FOR PREGNANCY

TABLE B-1A Equations to Estimate Energy Requirement for Pregnant Women by Trimester

 Estimated Energy Requirement (kcal/day) = Nonpregnant EER + Pregnancy Energy Deposition 1st trimester EER = Nonpregnant (adolescent or adult) EER + 0 2nd trimester EER = Nonpregnant (adolescent or adult) EER + 340 3rd trimester EER = Nonpregnant (adolescent or adult) EER + 452 NOTE: EER = Estimated Energy Requirement. Use equations in Table B-1B to calculate non-pregnant EER. EER for adult women should be used for ages 19-50 years; EER for adolescent girls should be used for ages 9-18 years SOURCE: IOM, 2006.

TABLE B-1B Equations to Calculate Estimated Energy Requirement (EER) for Nonpregnant Adolescents or Adult Women

 14-18 Years of Age Estimated Energy Requirement (kcal/day) = Total Energy Expenditure + Energy Deposition EER = 135.3 − (30.8 × age [y]) + PA × [(10.0 × weight [kg]) + (934 × height [m])] + 25 19 Years and Older Estimated Energy Requirement (kcal/day) = Total Energy Expenditure EER = 354 − (6.91 × age [y]) + PA × [(9.36 × weight [kg]) + (726 v height [m])] NOTE: PA = Physical Activity Coefficient. Use equations in Table B-1C to calculate PA. SOURCE: IOM, 2006.

TABLE B-1C Physical Activity Coefficients (PA values) for Use in EER Equations for Adolescents or Adult Women

 Sedentarya (PAL 1.0-1.39) Low Activeb (PAL 1.4-1.59) Activec (PAL 1.6-1.89) Very Actived (PAL 1.9-2.5) 14-18 Years of Age 1.0 1.16 1.31 1.56 19 Years and Older 1.0 1.12 1.27 1.45 NOTE: PAL = Physical Activity Level. aE.g., typical daily living activities (e.g., household tasks, walking to the bus). bE.g., typical daily living activities PLUS 30-60 minutes of daily moderate activity (e.g., walking at 5-7 km/h). cE.g., typical daily living activities PLUS at least 60 minutes of daily moderate activity. dE.g., typical daily living activities PLUS at least 60 minutes of daily moderate activity PLUS an additional 60 minutes of vigorous activity or 120 minutes of moderate activity. SOURCE: IOM, 2006.

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