RT Journal Article SR Electronic T1 Amniotomy has no effect on shortening of spontaneous labour JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 66 OP 66 DO 10.1136/eb-2013-101482 VO 19 IS 2 A1 François Audibert YR 2014 UL http://ebm.bmj.com/content/19/2/66.abstract AB