104. VETERINARY OBSTETRICS. 
Inversion, or Eversion, of the Uterus. 
(Procidentia Urert.) 
This signifies the protrusion of the uterine mass 
beyond the outside of the vulva. The size and appear- 
ance will depend upon the length of time the organ 
has been in that situation. 
The cause is not always evident. It may be 
seen after a healthy case of labor, or an extremely 
difficult one. It is of much more frequent occur- 
rence in the Cow than in the Mare. Sometimes 
it is due to lack of tone of the muscular system, 
the uterus failing to contract normally after parturi- 
tion. It is sometimes observed in animals that have 
calved immediately after coming off a railway journey, 
and is then believed to be due to excitement or 
injury. Occasionally it is caused by retention of 
of the foetal membranes. If the inversion be complete, 
the mass may be seen hanging as low down as the 
hocks. The color may vary from a bright, healthy red, 
to a dark brown, nearly black, depending entirely upon 
the length of exposure, and the strangulation of the 
vessels. 
If the animal has been lying down for any length 
of time, the most dependent part will have the greatest 
amount of discoloration. 
The ¢veatment will depend altogether on the length 
of time the organ has been exposed. Ascertain exactly 
when it was expelled, and what treatment, if any, has 
been adopted in the interval, and then decide whether 
it is advisable to attempt to return it or not. 
If the mass be dark, cold to the feel, and a number 
