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OBJECTIVE	A wide range of herbal plants have been reported to treat various gynecological problems of women .
OBJECTIVE	This study was set out to investigate the effect of ginger ( Zingiber officinale ) on heavy menstrual bleeding ( HMB ) in high school girls .
METHODS	Ninety-two young women who experienced HMB and met the inclusion criteria were recruited in this study .
METHODS	Participants were evaluated for six consecutive menstrual cycles .
METHODS	During 3 assessment cycles , their HMB was confirmed by Pictorial Blood Assessment Chart .
METHODS	They were then randomly allocated to two study groups to receive either ginger or placebo capsules .
METHODS	The participants filled in the same chart during three intervention cycles .
RESULTS	The level of menstrual blood loss dramatically declined during the three intervention cycles in ginger-receiving group .
RESULTS	The decrease of blood loss in ginger-receiving group was significantly more remarkable than that of participants receiving placebo ( p < 0.001 ) .
RESULTS	Minimum number of participants reported adverse effects .
CONCLUSIONS	HMB is highly prevalent among young women .
CONCLUSIONS	Considering the significance of appropriate and timely treatment and also the importance of prevention of unwanted consequences , ginger may be considered as an effective therapeutic option for HMB .

