MATERNAL DYSTOKIA. 95 
It is generally due to some accident in the later 
months of pregnancy, through falling or being cast. 
Some authorities think that the movements of a strong 
foetus may bring it about. The condition is often 
difficult to diagnose. The labor pains may have been 
present for some time, and the animal apparently very 
Fic. 43. 
LEFT UTERINE TORSION 7m situ. 
1, Body of the Uterus; 2, Twisted cervix uteri; 3, Vagina; 4, Left 
Fallopian Ligament. 
uncomfortable, but still there is no appearance of the 
amniotic sac or fluid. If the abdomen of the patient 
be examined, it may be larger on one side than the 
other, the large side being that to which the uterus. 
has turned. If explored per vagina, the os-uterd is 
constricted or closed. If the fingers can be passed into 
the os, the mucous membrane will be found to have 
