Methods	RCT, placebo controlled trial.
Participants	Setting: not clear. 36 women. Inclusion criteria: healthy, nulliparous women, 41 weeks’ gestation and Bishop score < 9
Interventions	Intervention group: 2.5 mg intravaginal PGE2, with 2nd dose if labour not established 24 hrs later Comparison group: placebo gel, with 2nd dose after 24 hrs if labour was not established
Outcomes	Change in cervix after 48hrs.
Notes	Information from brief abstract.
Risk of bias
Item	Authors’ judgement	Description
Adequate sequence generation?	Unclear	Described as “randomized”.
Allocation concealment?	Unclear	No information.
Blinding? Women	Yes	Described as double-blind trial with placebo gel.
Blinding? Clinical staff	Yes
Blinding? Outcome assessor	Unclear	No information.
Incomplete outcome data addressed? All outcomes	Unclear	Little information on methods. It appeared that all women were available at follow up