Study Evaluating Levonorgestrel/Ethinyl Estradiol (LNG/EE) in PMS

Inclusion Criteria: * Healthy women aged 18 to 49 years * Regular 21 to 35 day menstrual cycles for 3 months prior to study visit 1 * History of menstrual cycle related symptoms as determined by the investigator. Exclusion Criteria: * Contraindication to combination oral contraceptives * Depression requiring hospitalization or associated with suicidal ideation within the last 3 years * Use of antidepressants/anxiolytics within 10 days of screening and for the duration of the study.