Body time and social time: Mood patterns by menstrual cycle phase and day of the week

Multiple regression analysis traces the effects of two time dimensions (body time as indexed by the female menstrual cycle, and social time as indexed by the calendar week) upon moods, in a prospective study of daily moods over a 40-day period. Positive moods peaked in the ovulatory phase and on weekends, while negative moods peaked in the luteal phase of the menstrual cycle. An individual difference analysis showed that women whose moods are responsive to the menstrual cycle are physically active, socially assertive, sexually orgasmic women for whom the maternal role is important.