Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Proportion of women willing to continue with treatment
Systematic review	44 women Data from 1 RCT	Proportion of women who were willing to continue their treatment 77% with progestogen-releasing IUD 22% with norethisterone Absolute numbers not reported	Reported as significant P value not reported	Effect size not calculated	progestogen-releasing IUD