loo Diseases of (he Genital Organs 



After a cow has been pregnant, increasing with each preg- 

 nancy, the relations of the cervical tissues become modified. 

 The second annular fold of the cervical mucosa becomes en- 

 larged, both elongated and thickened, and the antero-poste- 



FiG. 39 — Instruments for tlie Examination of the Genitalia of Cows. 



I, icf' uterine forceps ; 2, Palmer's uterine dilator, modified ; j, Bozeman's 

 uterine dressing forceps ; 4^ small uterine catheter. 



rior grooves become comparatively deeper, cutting the ring 

 into a series of deep, pedunculated lobes. Eventually these 

 push their way out through the vaginal ring or os uteri ex- 

 ternum into the vagina. The vaginal ring now serves as a 

 band surrounding the protruding second ring. The second 

 ring then becomes the most posterior portion of the cervix. 



