For most cycles in the past year...

[Sam]

Five or more of the following symptoms (at least one related to mood) for most menstrual cycles in the past year are:

Depression

Anxiety or tension

Sudden mood changes

Irritability

Loss of interest in daily activities

Difficulty concentrating

Decreased energy

Food cravings and appetite changes

Insomnia or sleepiness

Physical symptoms, such as breast tenderness or bloating

Symptoms interfering with activities, work, school, or relationships

Symptoms not being due to a cyclical exacerbation of another disorder

Documentation by daily symptom ratings for at least two menstrual cycles

Source: Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV)

~S