Henry 1969.

Study characteristics
Methods	RCT with inadequately reported randomisation methods
Participants	Number of women randomised: 112 Setting: Birmingham, UK Study date: not reported Inclusion criteria (not well specified) GA: 41+ weeks Certain of dates Primiparous and multiparous women Exclusion criteria Not specified State of cervix: Not mentioned as a criterion
Interventions	Induction group (n = 55): AROM and oxytocin ("surgical" group) versus EM group (n = 57): weekly amnioscopy
Outcomes	Mother: number of days past term; prolonged labour; mode of birth Baby: perinatal death; birthweight
Notes	4 women in expectant group and 1 in induction group were randomised before 41 weeks. Funding: not reported Declaration of interests: not reported
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	The method of sequence generation was not reported.
Allocation concealment (selection bias)	Unclear risk	The method of allocation concealment was not reported.
Blinding of participants and personnel (performance bias) All outcomes	High risk	Blinding was not feasible.
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Blinded outcome assessment was not mentioned.
Incomplete outcome data (attrition bias) All outcomes	Low risk	No apparent losses to follow‐up or exclusions
Selective reporting (reporting bias)	Unclear risk	No outcomes were prespecified in the methods; no access to trial protocol to further assess selective reporting
Other bias	Low risk	Appeared to be free of other bias