This study is being conducted to evaluate the effects of treatment with Seasonique an extended-regimen oral contraceptive that utilizes low dose ethinyl estradiol during the typical hormone-free interval. Patients will receive 26 weeks of treatment. The overall study duration will be approximately 9 months. Patients will be required to record menstrual pain in a daily diary.

Inclusion Criteria:

• Moderate to severe menstrual-related pain
• Regular spontaneous menstrual cycles

Exclusion Criteria:

• Any contraindication to the use of oral contraceptives
• Treatment with an oral contraceptive in the last 3 months
• Previous treatment failure with an extended oral contraceptive regimen