Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Adverse effects
RCT	40 women with 3 or more consecutive miscarriages and high uNK cells on screening	Proportion of women who delivered preterm at <37 weeks 1/20 (5%) with prednisolone 0/20 (0%) with placebo	RR 3.0 95% CI 0.1 to 69.5 P value not reported		Not significant