Ulmsten 1979.

Methods	RCT.
Participants	100 primips, term, intact membranes, singleton, cephalic.
Interventions	IV oxytocin. 2 mU increasing every 30 minutes to a maximum dose of 24 mU vs intracervical PGE2 0.5 mg x 1. ARM was not performed until labour was well established and cervical dilatation was greater than 4 cm.
Outcomes	Vaginal delivery not achieved in 24 hrs, uterine hyperstimulation with FHR changes, C/S, uterine hyperstimulation without FHR changes, instrumental vaginal delivery, Apgar score < 7 at 5 minutes, maternal nausea, maternal vomiting, maternal diarrhoea.
Notes	No mention of randomisation technique or allocation concealment.
Risk of bias
Bias	Authors' judgement	Support for judgement
Adequate sequence generation?	Unclear risk	No information.
Blinding? Women	High risk	Different treatments compared.
Blinding? clinical staff	High risk
Blinding? outcome assessor	High risk
Free of selective reporting?	Low risk