A large Cochrane review (27 studies, 3,964 women) that evaluated the effectiveness of interventions for preventing excessive GWG and associated pregnancy complications found insufficient evidence to recommend any intervention for preventing excess GWG due to methodological limitations of included studies and the small observed effect sizes [14]. Conversely, another large systematic review and meta-analysis of ten antenatal dietary and lifestyle intervention randomised controlled trials (RCTs) in obese pregnant women showed an average 2.2 kg reduction in GWG in the intervention compared to the control group participants [18]. This collective evidence base suggests that high-quality trials to evaluate interventions for the promotion of healthy GWG are still needed.