Countries around the world have identified obesity prevention as a significant health priority [1]. Interventions timed when populations and individuals are at risk of increasing adiposity can deliver significant quality of life and cost savings, even when the improvement in obesity
prevalence is only modest [2]. Evidence suggests that pregnancy is a time of heightened risk for the development of excess adiposity [3]. Promoting healthy weight gain during pregnancy and preventing excess gestational weight gain (GWG) are fast becoming key frontiers in obesity prevention and offer unique opportunities for public health approaches to prevention.