Date	Event	Description
11 September 2012	Amended	Contact details updated.
31 May 2010	New search has been performed	One new trial added to the review. This did not change the conclusions of the review. Prof FY Chan removed from authorship (deceased 2007) although previous input gratefully recognised.
1 October 2009	Amended	Search updated. Five reports added to Studies awaiting classification (Caliskan 2009a; East 2006b; Prieto 2008a; Rouse 2008; Rouse 2009).
10 November 2008	Amended	Contact details updated.
18 February 2008	Amended	Converted to new review format.
17 January 2007	New citation required and conclusions have changed	Search updated in November 2006. We identified and included four new trials (Bloom 2006; East 2006; Klauser 2005; Kuhnert 2004). The original version of this review concluded that the addition of fetal pulse oximetry to cardiotocography decreased the caesarean section and operative delivery rates for nonreassuring fetal status, with no difference in overall caesarean section rates. The addition of the four new trials confirmed these conclusions when nonreassuring fetal status was identified prior to study entry. When nonreassuring fetal status was not present prior to study entry, knowledge of fetal pulse oximetry values made no difference to caesarean section rates for nonreassuring fetal status or for all indications.