Long 1994.

Methods	This trial compared pregnant women receiving auricular acupressure and rivanol with a control group who received rivanol only.
Participants	400 women were recruited from China. No other details were provided.
Interventions	Auricular acupuncture was applied to points: Inner genitals, Sympathetic, Shenmen, Liver, Yuanzhong and Adrenal gland, using a white mustard seed or a pill with adhesive plaster. The points were pressed by the woman until the points felt warm, and distention and a numb sensation was generated. The control group received 1% rivanol.
Outcomes	Time to induce labour, amount of bleeding, length of labour, and mental state of the woman.
Notes	Contact was attempted with the author; it was advised the author had retired, and no contact could be established. Study duration not reported Funding: not reported Conflicts of Interest: not reported
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Women were equally divided into the 2 groups, no further details provided.
Allocation concealment (selection bias)	Unclear risk	Not stated
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Not stated
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not stated
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Not stated
Selective reporting (reporting bias)	Unclear risk	Not stated
Other bias	Unclear risk	Not stated