1 88 Veterinary Obstetrics 



b. Those which emanate from the Pfliiger sheaths or from 

 yellow bodies. 



c. Cysts which originate in hemmorrhages or colloid degenera- 

 tion of cells, especially in malignant neoplasms. 



Because subclasses b and c produce nymphomania only very 

 rarely and consequently possess no great clinical importance, 

 the subject, as related to these, will not be pursued further here. 

 We will simply re mark that not ever-yovaiiai L disease in - 

 r^i-jf^pa riY"iplTTTig^ig and tjiat anoyai2j_Jinxie£_5ome^^_cond^tiQns, 

 may possess a- -tumor as large as the fist witheut—producing 

 syiBiptlJlils. of .nymphomania ; indeed a cow may have a badly 

 degenerated ovary, as we found in one particular case, and 

 nevertheless show normal estrum and become pregnant. We 

 have also repeatedly observed that, when but one ovary has 

 undergone even severe cystic degeneration, estrum may be 

 normal and impregnation occur. 



Undoubtedly, the most important and common disease of the 

 ovaries leading to nymphomania is the cy stic degeneration, whi ch 

 may be confi ned to only one or two ovi gaes and then be desig- 

 nated as solitary cyst formation, in contradistinction to multiple 

 cyst formation, in which numerous Graafian follicles become hy- 

 pertrophied in equal or unequal degrees. 



In regard to the formation of solitary cysts and fibrous degen- 

 eration of the ovaries, we would here make the supplementary 

 statement, or more properly, repeat that the right ovar5'- is more 

 frequently found diseased than the left, a fact which stands in 

 an intimate relation with the greater functional activity of the 

 right gland and the more frequent occurrence, approximately 

 70^0, of impregnations in the right horn. 



It is also interesting to note the fact, amply verified by us, 

 that large cysts, which, it is to be assumed, have required a 

 longer period of time for their development than do smaller ones, 

 cause no visibh' greater symptoms of nymphomania, but that the 

 volume of the cyst stands in no constant relation to the intensity 

 of the symptoms. 



The size of the solitary cysts varies from that of a hazelnut to 

 a hen's egg or a goose egg or even as large as a fist. In this 

 relation, it should be here remarked that, in cattle, Graafian fol- 

 licles measuring 1.5 cm. and upwards in diameter are to be re- 



