In its examination of the occurrence of physical and psychological change during the period just prior to the onset of menstruation we read in Psychological Medicine:
"Many studies have reported an increased likelihood of various negative affects during the pre-menstrual period. In this affective category are many emotional designations including irritability, depression, tension, anxiety, sadness, insecurity, lethargy, loneliness, tearfulness, fatigue, restlessness and changes of mood. In the majority of studies, investigators have found it difficult to distinguish between various negative affects, and only a few have allowed themselves to be excessively concerned with the differences which might or might not exist between affective symptoms." [Psychological Medicine, Monograph Supplement 4, 1983, Cambridge University Press, p.6] In the same article dealing with pre-menstrual behavioural changes we read: "A significant relationship between the pre-menstrual phase of the cycle and a variety of specific and defined forms of behaviour has been reported in a number of studies. For the purpose of their review, these forms of behaviour have been grouped under the headings of aggressive behaviour, illness behaviour and accidents, performance on examination and other tests and sporting performance." [Psychological Medicine, Monograph Supplement 4, 1983, Cambridge University Press, p.7]The lengthy review portrays how female behaviour is affected in these situations. In 'The Pre-menstrual Syndrome', C. Shreeves writes: "Reduced powers of concentration and memory are familiar aspects of the pre-menstrual syndrome and can only be remedied by treating the underlying complaint."
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