Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Live birth rates
Systematic review	54 women with recurrent miscarriage without antiphospholipid syndrome Data from 1 RCT	Proportion of women who had a live birth 22/27 (81%) with low-dose aspirin 22/27 (81%) with placebo	RR 1.00 95% CI 0.78 to 1.29 P = 1.0 The RCT had a small sample size, the method of randomisation was not stated, and allocation concealment was unclear		Not significant