CHAPTER X. 
MATERNAL DYSTOKIA. 
Deformity of the Pelvis. 
Complete deformity of the pelvis is rare in our 
subjects. It is most frequently observed in the Pig, 
due, generally, to rachitis. 
Fractures. 
Callosities, resulting from fracture of some of the 
pelvic bones, may give rise to difficult parturition. 
Exostoses. 
When these occur on the bones of the pelvis, and 
project so as to cause narrowing of the passage, they 
may become an obstacle to the delivery of the foetus. 
Treatment.—This will depend upon circumstances, 
and expediency. If delivery be impossible, without 
serious injury to the parent, and the latter fit for food, 
then it may be advisable to callin the butcher. Or, if 
the animal is in poor condition and unfit for butching, 
artificial abortion may be produced while the foetus is 
small enough to easily pass through. Should par- 
turition have commenced, it will then be necessary to 
resort to surgical or obstetrical measures before 
delivery can be effected. 
The indications are: forcible extraction of the 
foetus through the narrowed passage ; widening of the 
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