INTERNAL SECRETION OF OVARY 



245 



number of ova present in the remaining ovary, or in the 

 ovarian fragment, enters into folhcular development, and that 

 there is no increase in the number of ova. 



New formation of ova in post-natal hfe may indeed be 

 possible under certain circumstances. Athias (1920) relates 

 having observed such a phenomenon in an engrafted ovary 

 in the guinea pig. 



Fig. 1 10. — Decrease of number of oocytes in ovarian fragment, x 200. 

 B. Section through ovarian fragment of rabbit of same age as A (Prot. 

 Nr. 134). The fragment represented originally about J to ^ of 

 an ovary, but six months later it had almost the same weight 

 as a normal ovary at this age. A place extremely "rich" in 

 oocytes was chosen in B. The number of oocytes in B is much 

 reduced as compared with A. 



Prepar. of Wagner; photo of Kull. 



When comparing the condition of a testicular and an 

 ovarian fragment, two questions arise: — first, how the differ- 

 ence between them can be explained, and secondly, whether 

 the hypertrophy of the ovarian fragment is really a com- 

 pensatory one for endocrine purposes. 



The first question can be settled, I think, without special 

 difficulty. Since the number of young ova in readiness, so to 



