Gestational diabetes needs to be managed

To the Editor: McIntyre and Oats promote the International Association of the Diabetes and Pregnancy Study Groups (IADPSG) criteria for gestational diabetes mellitus (GDM) as being well reasoned.1 Derived from observational data and mathematical modelling in an attempt to provide a worldwide definition and to improve outcomes, these criteria will significantly increase the number of women diagnosed with GDM2 in health care systems that have limited resources. To help achieve cost savings, clinicians should be leaders in preventing interventions in circumstances where effectiveness or harm is unknown.3