Cochrane Systematic Reviews 

Progesterone or progesterone releasing IUD systems for heavy menstrual bleeding

Lethaby AE, Cooke I, Rees M.. Progesterone or progestogen-releasing intrauterine systems for heavy menstrual bleeding. Cochrane Database of Systematic Reviews 2005, Issue 3. Art. No.: CD002126. DOI: 10.1002/14651858.CD002126.pub2

http://www.cochrane.org/reviews/en/ab002126.html  to link to the abstract of this Cochrane review.