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Menstruation belongs distinctly to the tubes and uterus. It is a regular rhythmic action. It is controlled by the automatic menstrual ganglia situated in the walls of the tubes and uterus. These rhythmic little brains manifest themselves to the observer by circulatory change and increased motion. Menstruation might be named tubai motion. By direct observation in man and animals, I have noted the following midway between the monthly, or at times far remote from œstrus or rutting. The tubes and uterus are of quite a pale pink color. In short they are not congested, and still. But at the menstrual period or the season of œstrus the tubes and uterus are congested and in active peristaltic motion. The tubes are of a dark blue color from their dilated vessels being full of blood. The congestion of the uterus is intense but not so manifest as the tubes. The tubes are
ROBINSON B. THE MENOPAUSE.. JAMA. 1894;XXIII(9):345-351. doi:10.1001/jama.1894.02421140017002e