352 THE PHYSIOLOGY OF REPRODUCTION 



planting the ovaries to new situations. Other experiments were 

 undertaken in which the ovaries were simply removed without being 

 transplanted. The rats were killed at intervals varying from one 

 to fourteen months after the operation. In the control animals 



FIG. 93. Section through ovary of rat after transplantation on to peri- 

 toneum, showing corpora lutea and small follicle with ovum. (From 

 Marshall and Jolly.) 



pronounced fibrosis or other atrophic appearances were always found 

 in the uterus. On the other hand, in those animals in which ovaries 

 had been successfully transplanted on to abnormal positions (such as 

 on to the ventral peritoneum or into one of the kidneys) the uterus 

 was found undegenerated. If, however, the ovarian graft failed to 

 " take," or was only partially successful, the uterus presented 



