Kerekes 1979.

Methods	3‐arm controlled randomised trial
Participants	140 women were randomised in a hospital setting in Hungary. The population comprised women of unspecified parity, unspecified whether singleton or multiple pregnancy, at unspecified risk for PPH, who delivered by vaginal delivery. Exclusion criteria were not specified.
Interventions	200 mcg of ergometrine administered IV bolus versus no treatment
Outcomes	The study recorded the following outcomes: third stage duration (minutes).
Notes	Contact with study authors for additional information: yes. Additional data from authors: no
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Sequence generation was not reported.
Allocation concealment (selection bias)	Unclear risk	Allocation concealment was not reported.
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Blinding (of study participants and caregivers) was not reported.
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Assessor blinding was not reported.
Objective assessment of blood loss	Unclear risk	Investigators appraised blood loss by collection in a container placed under the mother during the third stage of labour until 2 hours postpartum. The contents of the container were transferred to a measuring cylinder. However, blood loss data were not reported in a format that could be extracted for the purpose of this review.
Incomplete outcome data (attrition bias) All outcomes	Low risk	Data were collected completely from all randomised study participants.
Selective reporting (reporting bias)	Unclear risk	The protocol of the study was unavailable for verification.
Intention to treat analysis	Low risk	All those who were enrolled and randomly allocated to treatment were included in the analysis, in the groups to which they were randomised.
Funding source	Unclear risk	Source(s) of funding for the study were not reported.