TABLE 8-1Gestational Weight Gain (kg) by Prepregnant BMI Categories Among Large Studies Compared to New Guidelines

Prepregnant BMI CategoryNew GWG GuidelinesStudy
Sweden, National (1994–2002)aDanish National Birth Cohort (1996–2002)bPregnancy Risk Assessment Monitoring System (2002–03)cNew York City Vital Statistics Birth Data (1995 to 2003)dPregnancy, Infection, and Nutrition Cohort Study (2001–2005)e
Underweight (< 18.5 kg/m2)12.5–18.013.5 ± 0.03 (SEM) (n = 72,361)15.3 ± 5.1 (SD) (n = 2,648)14.8 ± 0.27 (SEM) (n = 1,628)15.1 ± 5.01 (SD) (n = 1,632)15.4 ± 4.4 (SD) (n = 176)
Normal weight (18.5–24.9 kg/m2)11.5–16.013.8 ± 0.01 (SEM) (n = 368,063)15.8 ± 5.2 (SD) (n = 41,569)15.0 ± 0.10 (SEM) (n = 11,513)15.1 ± 5.25 (SD) (n = 19,892)16.6 ± 5.3 (SD) (n = 652)
Overweight (25.0–29.9 kg/m2)7.0–11.513.2 ± 0.02 (SEM) (n = 153,769)14.7 ± 6.4 (SD) (n = 11,861)13.9 ± 0.16 (SEM) (n = 5,027)14.1 ± 6.07 (SD) (n = 7,893)15.5 ± 6.2 (SD) (n = 126)
Obese (≥ 30 kg/m2)5.0–9.0—10.5 ± 8.3 (SD) (n = 4,814)11.2 ± 0.20 (SEM) (n = 4,588)11.9 ± 6.84 (SD) (n = 4,890)12.0 ± 7.1 (SD) (n = 277)
Obese, class I (30–35 kg/m2)Not specified11.1 ± 0.05 (SEM) (n = 43,128)11.4 ± 7.5 (SD) (n = 3,541)—12.7 ± 6.53 (SD) (n = 3,077)—
Obese, class II (35-–40 kg/m2)Not specified8.7 ± 0.11 (SEM) (n = 14,713)7.7 ± 9.4 (SD) (n = 1,273)—11.1 ± 7.17 (SD) (n = 1,166)—
Obese, class III (≥ 40 kg/m2)Not specified———9.5 ± 7.00 (SD) (n = 647)—
a

Cedergren, 2006 (BMI categories: underweight = < 20 kg/m2; normal weight = 20–24.9 kg/m2; obese, Class II = ≥ 35 kg/m2).

b

Information contributed to the committee in consultation with Nohr (see Appendix G, Part I); Obese, Class II and III are combined.

c

P. Dietz, CDC, personal communication January 2009 (states included: AK, AL, FL, ME, NY [excludes NYC], OK, SC, WA, WV).

d

Information contributed to the committee in consultation with Stein (see Appendix G, Part III).

e

Deierlein et al., 2008 (BMI categories: underweight = < 19.8 kg/m2; normal weight = 19.8–26.0 kg/m2; overweight = 26.0–29.0 kg/m2; obese = > 29.0 kg/m2).

From: 8, Approaches to Achieving Recommended Gestational Weight Gain

Cover of Weight Gain During Pregnancy
Weight Gain During Pregnancy: Reexamining the Guidelines.
Institute of Medicine (US) and National Research Council (US) Committee to Reexamine IOM Pregnancy Weight Guidelines; Rasmussen KM, Yaktine AL, editors.
Washington (DC): National Academies Press (US); 2009.
Copyright © 2009, National Academy of Sciences.

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