Table 1 Inclusion criteria of GJBNH study

1. Female aged 18 to 35 years.

2. Women whose period cycle was 30 ± 3 days during last 3 months.

3. Women who have menstrual pain (dysmenorrhea) over 6 degrees by the Visual Analogue Scale (VAS) at screening.

4. Women who are diagnosed with blood stagnation by two oriental medical gynecologic specialists.

5. Have given a written informed consent form

6. Have given a written informed consent form for genetic study.