Gianaroli 1996b.

Methods	Randomized controlled trial
Participants	Country: Italy Female infertility n=167 recruited Inclusion criteria: infertile women with known indications for conventional IVF, with normo‐ovulatory, aged ≤38years, normal uterine morphology and endometrial biopsies. Duration of study: 18 months
Interventions	Short exposure (1h) versus   control standard exposure (16h)
Outcomes	Ongoing pregnancy rate, clinical pregnancy rate, miscarriage rate, fertilization rate, polypronuclear rate, implantation rate
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	No details of how randomization was carried out
Allocation concealment (selection bias)	Unclear risk	Not mentioned
Incomplete outcome data (attrition bias) All outcomes	Low risk	No incomplete outcome data
Selective reporting (reporting bias)	Unclear risk	Did not report live birth, the primary outcome of the review
Other bias	Unclear risk	Can not definitively assess other bias
Blinding of participants and personnel (performance bias) All outcomes	Low risk	Not mentioned, but the review authors considered that blinding was not likely to influence the risk of performance bias for the primary review outcome and secondary outcomes
Blinding of outcome assessment (detection bias) All outcomes	Low risk	Not stated, but the review authors judged that the outcome measurement was not likely to be influenced by lack of blinding