Study	Reason for exclusion
Azizkhani 2018	Comparison is alternative not medical treatment.
Gupta 2013	The comparison is using all medical treatment and there is no data specifically for cyclical progestogen (even though it is one of the comparators). No randomization between other medical treatments, women were allowed to choose their treatment when allocated to other medical treatment.
Karakus 2009	The population is women with irregular bleeding.
Kucuk 2008	Quasi‐randomized trial; it was done by a predefined application order.