CHAPTER III 



THE CHANGES THAT OCCUR IN THE NQN- 

 PREGNANT UTERUS DURING THE CESTROUS 

 CYCLE 



"Menstruation is like the red iiag outside an auction sale ; it shows that 

 something is going on inside." — Matthews Duncan. 



Foe full descriptions of the morphology of the uterus in the different 

 niEimmalian orders, reference may be made to the text-books on 

 human, comparative, and' veterinary anatomy. But before passing 



Fig. 2. — Transverse section through Fallopian tube, showing folded 

 epithelium and muscular coat. 



on to describe the changes which occur in the histology of the uterus 

 during the menstrual cycle, it may not be out of place to remind the 

 reader of the general structural relations of the, generative organs in 

 the human female. 



The two ovaries, the structure of which is described in the next 

 chapter, are situated one on each side of the pelvis, and are connected 



