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Associations between resting energy expenditure (REE) and prepregnancy body mass index (BMI; REE data are expressed as kilocalories per day. The height of each bar represents the mean ± standard error). (a) No diabetes. (b) Diabetes. *P < 0.05, **P < 0.01). G1, first trimester; G2, second trimester; G3, third trimester; P, postpartum.
