Razi 2013.

Study characteristics
Methods	Prospective randomised First ICSI cycle March 2009 to April 2010 Fresh ET on Day 2
Participants	182 infertile couples with male factor
Interventions	LAH on the morning of fresh ET (Day 2 embryos) Experimental group had LAH (n = 90) Control group had no LAH (n = 92)
Outcomes	Live birth rate, multiple pregnancy rate, clinical pregnancy rate, congenital anomaly rate
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Computer‐generated number
Allocation concealment (selection bias)	Unclear risk	No information provided in article or by correspondence
Blinding (performance bias and detection bias) All outcomes	Low risk	Correspondence with study author ‐ both clinicians and patients blinded
Incomplete outcome data (attrition bias) All outcomes	Low risk	Appears complete
Selective reporting (reporting bias)	Low risk	Appears complete
Other bias	Low risk	None identified