54 INTRODUCTION TO SEXUAL PHYSIOLOGY 



It would seem likely, therefore, that in these cases the menstrual 

 degeneration is the equivalent of prooestrum alone, uncomplicated 



Fig. 31.— Section through mucosa of human uterus, showing 

 sub-epitheUal hsematomata *. (From Sellheim.) 





Fig. 82.— Section through mucosa of menstruating human uterus, 

 sliowing bleeding into the cavity *. (From Sellheim.) 



by pseudo-pregnancy. The great variation in the severity of 

 menstruation in man may be partly accounted for in the same 



