Valojerdi 2010.

Study characteristics
Methods	Single‐centre randomised trial
Participants	400 women in Iran undergoing first treatment cycle and women with previous failed cycles Mean age: control group 29.85 (5.14); AH group 30.86 (5.82)
Interventions	Partially thinned by laser AH: 200 women randomised Control: 200 women randomised
Outcomes	Clinical pregnancy, implantation rates
Notes	Power calculation not reported ITT analysis unclear
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Randomisation list participants
Allocation concealment (selection bias)	Unclear risk	Methodological or linguistic confusion in description of allocation in the study. Sequential numbers in sealed envelopes (200 participants in each group)
Blinding (performance bias and detection bias) All outcomes	Unclear risk	Blinding of clinician but not patient
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Not stated
Selective reporting (reporting bias)	Unclear risk	Original protocol not viewed but study authors did not report on live birth
Other bias	Low risk	None identified