41 
In the vagina cysts, tumors, wounds, adhesions and 
strictures may be present, which, however, very seldom are 
the cause of sterility. 
The majority of endometritis and metritis cases in chroni- 
cally sterile cows are caused by: 
(1) Acute, more or less septic metritis which becomes 
chronic; 
Fig. 12—Cow from Bonderup. 
The sinewy band is cut through. 
(2) Benign and at once chronic and subdued processes 
with no or only little discharge; 
(3) Infection through the copulation, which, however, is 
very rare. 
The history of many cases, and a large number of exami- 
nations on cows, made one month after the last parturition, 
have convinced me that nearly all cases of endometritis are 
caused by an infection during the last delivery. These in- 
fections are the reason for inflammatory processes of differ- 
