Abstract
In 1911 I called attention1to certain factors which produce physical degeneration and increase the number of women suffering from dysmenorrhea, and suggested a method of treatment. The conclusions stated here and those of former papers as well are based on personal observation of several hundred average women during several thousand menstrual periods; they have been supplemented by experimental work in the physiologic laboratories of Johns Hopkins and Stanford University and in Dr. Kelly's laboratory at Baltimore. These observations and experiments have been almost continuous through a period of twenty-two years. In order to approach the subject of menstruation with a judicial mind it is necessary to discard preconceived ideas, sex traditions and individual experience — in short, to begin afresh, observing this function precisely in the same attitude of mind that one would observe other periodic functions, such as digestion, defecation, urination and sleep. With this dispassionate view

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