A prospective study of maternal prenatal weight and offspring cardiometabolic health in midchildhood.

PURPOSE

To examine the relations of maternal prepregnancy body mass index (ppBMI) and gestational weight gain (GWG) with offspring cardiometabolic health.

DESIGN

We studied 1090 mother-child pairs in Project Viva, a Boston-area prebirth cohort. We measured overall (dual x-ray absorptiometry total fat; body mass index z-score) and central adiposity (dual x-ray absorptiometry trunk fat), and systolic blood pressure in offspring at 6 to 10 years. Fasting bloods (n = 687) were assayed for insulin and glucose (for calculation of homeostatic model assessment of insulin resistance), triglycerides, leptin, adiponectin, high sensitivity C-reactive protein, and interleukin 6. Using multivariable linear regression, we examined differences in offspring outcomes per 1 SD maternal ppBMI and GWG.

RESULTS

After adjustment for confounders, each 5 kg/m² higher ppBMI corresponded with 0.92 kg (95% confidence interval, 0.70-1.14) higher total fat, 0.27 BMI z-score (0.21-0.32), and 0.39 kg (0.29-0.49) trunk fat. ppBMI was also positively associated with homeostatic model assessment of insulin resistance, leptin, high sensitivity C-reactive protein, interleukin 6, and systolic blood pressure; and lower adiponectin. Each 5 kg of GWG predicted greater adiposity (0.33 kg [0.11-0.54] total fat; 0.14 kg [0.04-0.23] trunk fat) and higher leptin (6% [0%-13%]) in offspring after accounting for confounders and ppBMI.

CONCLUSIONS

Children born to heavier mothers have more overall and central fat and greater cardiometabolic risk. Offspring of women with higher GWG had greater adiposity and higher leptin.