Figure 3.

Resting Metabolic Rate during Gestation. Resting metabolic rate is presented per study and gestational age (GA). The regression line represents the average increase in the resting metabolic rate during gestation (RMR[kcal/d] = 1334 + 10.3 × GA[weeks], R² = 0.55, using non-linear regression (pointed line) did not improve the prediction, R² = 0.57). Forsum¹ and Forsum² indicate the two different cohorts in the study: both measured before pregnancy, but at different times during gestation; Butte reported the changes in RMR per BMI class: ‘UW’ indicates underweight: BMI ≤ 19.8 kg/m², ‘NW’ indicates normal weight: BMI 19.8–26 kg/m², and ‘OV/OB’ indicates overweight/obesity: BMI ≥ 26 kg/m².