Higher pre-pregnancy body mass index is associated with excessive gestational weight gain in normal weight Chinese mothers with gestational diabetes

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To assess how pre-pregnancy body mass index (BMI) affects pregnancy outcome and total gestational weight gain (GWG) in a cohort of women with gestational diabetes (GDM).


Pregnant women at 24–28 gestational weeks diagnosed with GDM were classified as normal weight (pre-pregnancy BMI, 18.5–24.9 kg/m2) or overweight (pre-pregnancy BMI, 25.0–29.9 kg/m2). GWG was derived from the self-reported pre-pregnancy and pre-delivery weights, and analyzed using 2009 Institute of Medicine categories.


A total of 106 GDM women were categorized as normal weight (n = 79) or overweight (n = 27). No statistically significant differences were found between the groups in terms of various obstetrical and neonatal outcomes. Higher pre-pregnancy BMI, however, was associated with excessive GWG during pregnancy (difference between groups, P = 0.013). Furthermore, pre-pregnancy BMI (OR, 0.529; 95%CI: 0.377–0.742; P = 0.000) and pre-pregnancy overweight (OR, 3.825; 95%CI: 1.469–9.959; P = 0.006) were independent factors of GWG.


Among Chinese GDM women, overweight GDM mothers gain excessive weight during pregnancy. Regulation of pre-pregnancy bodyweight might be an appropriate precaution against excessive GWG.

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