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Background

The prevalence of gestational diabetes mellitus (GDM) is increasing, with approximately 15% of pregnant women affected worldwide, varying by country, ethnicity and diagnostic thresholds. There are associated short‐and long‐term health risks for women and their babies.

Objectives

We aimed to summarise the evidence from Cochrane systematic reviews on the effects of interventions for preventing GDM.

Methods

We searched the Cochrane Database of Systematic Reviews (6 August 2019) with key words ‘gestational diabetes’ OR’GDM’to identify reviews pre‐specifying GDM as an outcome. We included reviews of interventions in women who were pregnant or planning a pregnancy, irrespective of their GDM risk status. Two overview authors independently assessed eligibility, extracted data and assessed quality of evidence using ROBIS and GRADE tools. We assigned interventions to categories with …