66 
A comparison of results makes this statement very con- 
vincing. In 143 cows, which were treated in 1905-1906 with 
uterine douches, there were 139, or 96%, which showed heat 
symptoms after the treatment. In 99 cases they appeared 
inside of a month, in 35 inside of two months and in 4 in- 
side of three months, which was, on an average, inside of 20 
days after the treatment. Among the cases where the treat- 
ment was unsuccessful was one old case, one cow with 
nymphomania, and one with tuberculosis. 122 cows became 
pregnant, 99 of which conceived after the first cohabitation. 
I think it is quite evident that a metritis is more efficient- 
ly influenced through a direct treatment than through the 
pressing out of yellow bodies; specially in a pyometra I 
consider the treatment of the ovaries as quite illusive. This 
is still more the (illusive) case when a stenosis of the 
cervical canal is present. I have therefore given up pressing 
out the yellow bodies, and employ this treatment only in ex- 
ceptional cases, for example, in cows with a very small vulva. 
The Treatment of Sterility. 
I first try to eliminate all the animals which may be preg- 
nant by a careful examination per rectum; on the others I 
employ the treatment according to the diagnostic examina- 
tion per vaginam and sometimes also per rectum. 
The treatment is different when a recent metritis, with a 
more or less putrid discharge, or a chronic endometritic, or a 
pyometra is present. 
Since the endometritis as well as the pyometra is caused 
by an infection during delivery, it is important to pay more 
attention to diseases of the uterus shortly after the parturi- 
tion. 
The aim is 
1. To prevent an infection of the uterus, 
2. If an infection is present, to bring the metritis 
which follows to a quick termination. 
In regard to the first point, I think it important to note 
the most frequent cause of a malignant infection. This is the 
