Objectives: The purpose of this study is to report the effects of herbal medicine on corpus luteum and luteal hemorrhage. Ovulation is a physical event and hemorrhage from corpus luteum is known to occur in reproductive age group women. Life threatening hemorrhage requires surgical intervention and blood transfusion. Methods: The patients of this study are 34-year-old and 16-year-old females. They were diagnosed as the hemorrhagic corpus luteal cyst. Two patients was advised to be operated beacause of rupture possibility. They were treated by traditional Korean Medicine, herbal medicine (Bokryungdosu-tang), acupuncture and moxibustion. Results: After the treatment, the patients recovered their condition. One patient was diagnosed with disappearance of existing corpus luteum, the other was relieved of heavy abdominal pain, vaginal discharge and lumbago. Conclusions: Thess cases show that traditional Korean treatment might be effective on corpus luteum and luteal hemorrhage.