Date	Event	Description
4 June 2009	New search has been performed	Five new trials have been added (Dominguez 1999; Olmo 2001; Parikh 2001; Valadan 2005; Yang 1994). Additional data from new reports of Bilgin 1996 and Puertas 1996 have also been added. Twenty new reports have been excluded. One previously included study (Mahmood 1995) has been excluded in response to feedback. One report is awaiting classification (Perez 1992). The background and methods sections have been revised and the analyses have been modified. We have added sensitivity analyses and new sections describing the results of subgroup analyses.
4 June 2009	New citation required and conclusions have changed	A new review team prepared the update. Oxytocin appears safe but may increase interventions in labour. PGE2 may increase the chance of vaginal birth within 24 hours. The use of PGE2 in women with ruptured membranes warrants further research.
2 February 2009	Feedback has been incorporated	We have responded to all of the feedback received.