_— 
ABORTION 141 
7. Failure to breed after aborting. Only one of the twen- 
ty-four animals that experienced a premature birth failed to 
breed after aborting. This animal was killed and the Post 
Mortem examination showed the presence of an ovarian 
tumor which may or may not have been caused by the treat- 
ment administered to induce conception. Twenty-three of 
these cows produced a normal calf 461 days subsequent to 
abortion. Conception took place, therefore, on the average 
177 days (461—284=177) or practically six months after abort- 
Milk and Fat Yields of Ten Cows Following Normal Calving 
Compared with Abortion Period. 














Normal Calving Abortion Period 
RTD Yield of Yield of |From Normal to Nor Calving|Ave. Yield per Year 
of Caw) Milk ivi. | No. of ) Milk Yield /FatYield| Milk | | Fat 
1 Year Years! Pounds |Pounds| Pounds | Pounds 
el rsii 61 308 | 2.81 | 13496" | 638- |, 5842-).281 
ye 6134 | 247 1.47 | 8639 346 5877, | Foe 
3 0046 312 tego J1045 685 4738 | 294 
4 5264 2ork PACE 14475 C12) Ue oo! 297 
D 6225 298 2030 (16789 853 7029 | 356 
6 0197 308 2.08 | 12158 855 5845. ) “411 
i 4338 238 2.08 7803 493 3701 237 
8 5845 304 | Se Fa 6913 385 3906 229 
9 6244 274 2.00 8032 362 4016 181 
10 7302 318 2.30 10251 487 4574 212 
Petessoe |e 289.8 | 2.1 | | 5196 | 268.4 







ing. Experience indicates that it is useless to attempt to breed 
a cow for four or five months subsequent to aborting. Time 
must be given to recuperate. The success in getting these 
cows in calf after the premature delivery is attributed in part 
to the use of the yeast treatment. A yeast cake dissolved for 
twenty-four hours in a pint of warm water was injected into 
the vagina several days in succession previous to the time of 
mating. 
