1. Low-dose oral contraceptive pill for dysmenorrhea associated with endometriosis: a placebo-controlled, double-blind, randomized trial 
Tasuku Harada, M.D., Mikio Momoeda, M.D., Yuji Taketani, MD., Hiroshi Hoshiai, M.D., Naoki Terakawa, M.D. 
Fertility and Sterility 
Volume 90, Issue 5, Pages (November 2008)
DOI: /j.fertnstert
Copyright © 2008 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
A flow-chart of participants through the trial. OCP: oral contraceptive pill.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2008 American Society for Reproductive Medicine Terms and Conditions

3. Figure 2
Changes in mean dysmenorrhea score during the trial. OCP: oral contraceptive pill.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2008 American Society for Reproductive Medicine Terms and Conditions