Griffith, RJAlsweiler, JEmoore, ABrown, SMiddleton, PShepherd, ECrowther, CA2019-10-0620192019Cochrane Database of Systematic Reviews 2019, Issue 5. Art. No.: CD012394. DOI: 10.1002/14651858.CD012394.pub2.1469-493X1469-493Xhttps://hdl.handle.net/10292/12883This is a protocol for a Cochrane Review (Overview). The objectives are as follows: To summarise the evidence from Cochrane systematic reviews regarding the effects of interventions to prevent women developing gestational diabetes mellitus (GDM).Cochrane Reviews (including updates) published in the CDSR, with the exception of gold open access articles (see above), are free to view in the CDSR 12 months after publication. This applies only to those versions published with a new citation on or after 1 February 2013. If, for example, a Cochrane Review update was published on 1 February 2013, on 1 February 2014 the Cochrane Review will be free to view. However, earlier versions, including the Protocol and first version of the Cochrane Review will not be free to view. Protocols for Cochrane Reviews published after 27 February 2016 are free to view immediately upon publication. Protocols published between 1 February 2013 to 26 February 2016 are free to view to view 12 months after publication. Note that this applies to those versions published with a new citation on or after the given date.Journal ArticleOpenAccess10.1002/14651858.CD012394.pub2