Abdelmassih 2006.

Methods	Prospective randomised study, single centre. Randomisation method: not stated. Power analysis: not stated. Study period: not stated. Sample size: 206 women. Conflict of interest: not stated.
Participants	Normagonadotropic women with an indication for IVF/ICSI. Age < 35 years. No available baseline characteristics to compare.
Interventions	Luteal started pituitary downregulation with GnRH agonist. Standard treatment: from cycle day 2 onward daily 225 IU/L rFSH subcutaneous. Experimental treatment: from cycle day 7 onward daily additional 75 IU/L rLH until ovulation triggering with hCG.
Outcomes	Primary endpoints: clinical pregnancy rate, not defined implantation rate, not defined miscarriage rate, not defined Secondary endpoint: embryo quality, not defined
Notes	Abstract only. Funding: not stated
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Method of randomization not stated.
Allocation concealment (selection bias)	Unclear risk	Method of allocation concealment not stated.
Blinding of participants and personnel (performance bias) All outcomes	Low risk	Non‐blinding not likely to affect the outcomes of interest as they are objectively assessed.
Blinding of outcome assessment (detection bias) All outcomes	Low risk	Those who administered the intervention were not blinded but non‐blinding of outcome assessment not likely to affect the outcomes of interest as they are objectively assessed.
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Only abstract available.
Selective reporting (reporting bias)	Unclear risk	Study protocol not available, no live birth rates.
Other bias	Unclear risk	Insufficient information to make a conclusive judgement.