234 Qattle Problems. 



Concurrently with the engorgement of the uterine and 

 ovarian blood-vessels, a much thinned condition, and cor- 

 responding state of relaxation, in the capillary walls of the 

 uterine blood-vessels results ; and the enlarged size and 

 thinned walls of the capillaries must continue for a length 

 of time proportioned to the degree of expansion and re- 

 laxation, so making the reduction of the engorging quan- 

 tity of blood in the uterine and ovarian blood-vessels, a 

 s/ow and prolonged process. 



When coupling fever occurs at the natural season after 

 full-term delivery, it results conditionally, or from the 

 presence of an increased amount of blood, and blood heat 

 in the ovarian blood-vessels. And the presence of coupling 

 fever soon after the accidental engorgement that abortion 

 leads to, indicates the presence of augmented blood 

 and heat about the ovaries, from accidental engorgement. 

 It is no matter for wonder, therefore, that coupling fever 

 comes on in cows soon after abortment. Nor is it a mat- 

 ter for surprise, that the relaxed condition of the uterine 

 and capillary vessels, caused by engorgement, becomes 

 more or less chronic in numbers of cows. 



The active circulation of the blood in the ovarian ves- 

 sels continues as long as the engorgement, but the large 

 increase in their contents seems to account for the 

 increased quantity of heat, and its continuance in large 

 supply in the increased quantity of blood. 



The pathological condition of the ovarian vessels and 

 organs during accidental engorgement, is not, however, 

 clearly ascertainable. The occurrence and frequent re- 

 currence of coupling soon after abortment, indicates that 

 there is either a long continued, or frequently recurring 

 accumulation of heat about the ovaries; the excess of 

 blood certainly continuing for a considerable time. 



Physiologists state that ova are maturing at all seasons, 

 p,s may be necessary to make impregnation possible. But 



