Date	Event	Description
30 November 2016	New search has been performed	Eleven new trials have been added to the review (Liu 1986; Schneider‐Affeld 1982; Amiri 2012; Azhari 2013; Calvo Aguilar 2013; Phumdoung 2010; Phumdoung 2013; Sekhavat 2009; Schirmer 2011; Zaibunnisa 2015; Zhang 2016) and two trials excluded (Corton 2012; Thies‐Lagergren 2011). One trial, Hofmeyr 2015, is ongoing. Two studies, previously excluded have been included in this update (Liu 1986; Schneider‐Affeld 1982), although they did not contribute any outcome data. One trial previously included has now been excluded as it was found to compare two recumbent positions(Brément 2007). There are now a total of 32 studies in the review, with 30 trials contributing data.
30 November 2016	New citation required but conclusions have not changed	Conclusions have not changed.