Definition: Premenstrual syndrome, often called PMS, is a group of physical and emotional symptoms that occur during the late luteal phase of the menstrual cycle. In order for a diagnosis of PMS to occur, physical and/ or emotional symptoms must consistently appear during the last week before the onset of menstruation and disappear shortly after menstruation begins. The symptoms of PMS must also interfere with routine daily living, according to Contemporary Issues in Gynecology Vol. 2.
More: Do I Have PMS?
