Date	Event	Description
31 January 2017	New search has been performed	Search updated and one trial added.
31 January 2017	New citation required but conclusions have not changed	For this update, we assessed two reports of one trial from a search of Cochrane Pregnancy and Childbirth's Trials Register (January 2017). In total, five trials are now included (Crichton 1962; Gaitan 2009; Parsons 1985; Richards 1985; Thubisi 1993) and one is excluded (Farrell 2002). GRADEpro Guideline Development Tool was used to import data from Review Manager 5.3 (RevMan 2014) in order to create a 'Summary of findings’ table.
17 August 2010	New search has been performed	Search updated. No new trial reports identified.
20 September 2008	Amended	Converted to new review format.
27 June 2007	New search has been performed	Search updated. No new trials identified.
1 June 2004	New search has been performed	E Farrrell joined the review team. The title has been changed to include "or near term". A new literature search revealed no new studies relating to this review. Major changes have been made to the background, small changes to the criteria and some comments on the methodological quality of the articles. This was to comply with the reviewers' comments made previously. The ongoing study on clinical pelvimetry that was included previously has not been published. The randomisation for the trial did not work, as there were too few patients who were regarded as having small pelvises and all the revealed group's patients ignored the clinicians' advice.
1 April 2002	Amended	A new literature search revealed no new studies relating to this review. There are very minor changes to the review, namely stipulating that X‐ray pelvimetry was used in all the trials. In the next update a comment will be made on clinical pelvimetry. An ongoing study on clinical pelvimetry has been included in the ongoing studies section. The trial has been completed and as soon as it is published will be included in the review.