Does excess pregnancy weight gain constitute a major risk for increasing long-term BMI?

Area of Science:

• Obstetrics and Gynecology
• Public Health and Nutrition
• Maternal-Fetal Medicine

Background:

• Gestational weight gain (GWG) recommendations by the Institute of Medicine (IOM) aim to optimize maternal and infant health.
• Long-term consequences of deviating from GWG guidelines, particularly concerning postpartum weight retention and Body Mass Index (BMI), require further investigation.

Purpose of the Study:

• To evaluate the relevance of IOM's GWG recommendations for long-term BMI development in women.
• To determine if adherence to IOM guidelines influences postpartum weight retention and BMI 15 years after childbirth.

Main Methods:

• A follow-up study of 483 women from the Stockholm Pregnancy and Women's Nutrition cohort, who delivered between 1984-1985.
• Analysis of body weight changes at baseline, 6 months, 1 year postpartum, and 15 years postpartum using ANOVA.
• Multiple linear regression models were employed to identify predictors of BMI at the 15-year follow-up, assessing the impact of GWG categories.

Main Results:

• Women with excessive GWG gained significantly more weight (10.0 kg) by the 15-year follow-up compared to those with recommended (6.7 kg) or insufficient (6.2 kg) GWG (p < 0.01).
• A significant group-by-time interaction indicated that women with excessive GWG had consistently higher weights at all follow-up points.
• Excessive GWG was independently associated with a higher BMI 15 years postpartum (increase of 0.72 kg/m(2)) compared to women with recommended GWG.

Conclusions:

• The findings validate the adequacy of IOM's GWG guidelines for promoting not only pregnancy health but also preventing long-term weight retention.
• Healthcare providers should counsel women on appropriate GWG and encourage postpartum weight loss to mitigate future overweight risks.
• Adherence to GWG recommendations is crucial for long-term maternal metabolic health and preventing obesity post-delivery.