§ 5 



MODIFICATION IN FOLLICLE 



§ 5. Serial repetition of the possible modifications 



IN THE FOLLICLE 



In each of the four main groups referred to above we find 

 analogous modifications, which are repeated and are founded 

 upon the combinations of factors. In order to be able to keep 

 these several follicular derivatives distinct from each other 

 we have introduced the following terminology. 



The different modifications within each of the four main 

 groups are repeated serially because both the parts of the ovo- 

 follicular system and the combinations of factors are after 

 all limited, and each follicular derivative is the resultant of 

 these two. 



There are the following twelve possibilities of develop- 

 ment:— 



a. the retention of the ovum or its extrusion; 



b. the gland may become either solid (solidus) or hollow 

 (cavus) ; 



c. the gland may be formed from one kind of tissue only 

 (simplex) or from a combination of theca- and granulosa- 

 luteinisation (mixtus); 



d. the follicle may rupture (ruptus) or not; 



e. liquid may develop (cyst) or not; 



f. hyperaemia and haemorrhage (haemorrhagicus) may 

 follow or not. 



These possiblities have been summarized for all four 

 groups together in the following table. It will be seen that 

 out of 32 theoretical possibilities 28 have been realized in 

 nature. 



TABLE III 



