Jamal 2000.

Methods	Parallel randomised controlled trial conducted in University Hospital, Jeddah, Saudi Arabia Timing: 1995 to 1998
Participants	35 women randomised Inclusion criteria: not clearly specified but included women with refractory anovulatory infertility with polycystic ovaries with unsuccessful medical treatment Exclusion criteria: no details
Interventions	Unilateral laparoscopic ovarian drilling of 5 points in each ovary for 5 seconds, versus Bilateral laparoscopic ovarian drilling of 5 points in each ovary for 5 seconds Follow‐up for 3 months
Outcomes	Ovulaton rate and endocrine changes (no details)
Notes	Conference abstract only Conflict of interest: not stated
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	No details provided
Allocation concealment (selection bias)	Unclear risk	No details provided
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	No details provided
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	No details provided
Incomplete outcome data (attrition bias) All outcomes	High risk	States that 35 women randomised but no details on the numbers in each group, no details for any losses. Conference abstract only
Selective reporting (reporting bias)	High risk	Conference abstract only including no data that could be included in an analysis
Other bias	High risk	Conference abstract only. Unable to judge if groups were balanced at baseline