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Objective: Binge eating (BE) is associated with gestational weight gain, which is a risk factor for gestational diabetes (GDM). Little is known about this association in women with GDM. To evaluate the relationship of BE in pregnancy with gestational weight gain, BE at postpartum and postpartum weight retention in women with GDM., Method: Lifestyle INtervention for Diabetes prevention After pregnancy (LINDA-Brasil) is a multicenter cohort study with 1,958 women with GDM. BE was assessed by interview during recruitment in pregnancy and at a phone interview at ~4 months postpartum. Gestational weight gain was classified according to the 2009 Institute of Medicine (IOM) recommendations. Poisson regression with robust variance was used to estimate adjusted relative risks (RR)., Results: Prevalence of BE was 31.6% (95% confidence interval [CI] 29.5-33.6%) during pregnancy and 30.0% (95% CI 28.0-32.1%) at postpartum. The risk of exceeding the IOM's recommendation for gestational weight gain was 45% higher (RR 1.45, 95% CI 1.29-1.63) in women who had BE during pregnancy compared to those who did not. The risk of having postpartum weight retention above the 75th percentile was 33% higher (RR 1.33, 95% CI 1.10-1.59) among those with BE compared to those without., Discussion: Among these women with GDM, BE was frequent and was associated with excessive gestational weight gain and weight retention at postpartum. Thus, given the vulnerability of these periods of the life cycle, tracking this eating behavior is important for the management of gestational weight gain and for the prevention of excessive postpartum retention., (© 2020 Wiley Periodicals LLC.)