Gynecology . ds are stillsomewhat dilated, but there is very little edema of the stroma. and straight direction. When the bleeding has ceased, the edema of the stromadisappears and the pale swollen stroma cells regain their former postmenstrual regenerative stage lasts about fourteen days, when therhythmical changes in the mucosa begin anew. If no menstruation takes place, or, in other words, if conception has 30 GYNECOLOGY occurred, the premenstrual mucosa maintains its character and merges into atrue decidua. It has been shown that during the cyclical change there is an increa
Gynecology . ds are stillsomewhat dilated, but there is very little edema of the stroma. and straight direction. When the bleeding has ceased, the edema of the stromadisappears and the pale swollen stroma cells regain their former postmenstrual regenerative stage lasts about fourteen days, when therhythmical changes in the mucosa begin anew. If no menstruation takes place, or, in other words, if conception has 30 GYNECOLOGY occurred, the premenstrual mucosa maintains its character and merges into atrue decidua. It has been shown that during the cyclical change there is an increasingglycogen production from the mucosa, which reaches its height during themenstrual flow, after which it disappears, until the premenstrual stage beginsagain. This glycogen production is undoubtedly a provision for the nourish-ment of the egg. During the period of flow the superficial epithelial cells of the mucosa aresaid to lose their cilia. These are restored during the postmenstrual regenera-tive Fig. 6.—Endometrium At Beginning of glands, except for the one seen in the center, have collapsed, having discharged the mate-rial which was secreted during the premenstrual stage. The blood-vessels have been eroded bythe ferment contained in the secretion, allowing the blood to exude into the tissue and on the sur-face of the endometrium. The surface epithelium in this section is still intact. The cervical mucous membrane takes no part in the menstrual bleeding,but secretes an increased amount of mucus. There is a question as to whetherthe tubal mucous membrane shares in the bleeding. It probably does not, asa rule, but there is evidence from abdominal operations done during the men-strual period, where the tube can be inspected, that there is sometimes anassociated tubal menstruation. The researches of Hitschmann and Adler have been questioned to someextent, but in the main they are now nearly universally accepted. PHYSIOLOGY OF THE UTERUS AND OVARIES
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