GRANULAR VENEREAL DISEASE AND ABORTION IN CATTLE. 
39 
Table 5. — Chronological order of abortions in cows of herd A from third pregnancy 
onward. 
Number 
of 
pregnancy. 
1899 
1900 
1901 
1902 
1903 
1904 
1905 
1906 
1907 
1908 
1909 
1910 
1911 
Total. 
Third 
1 
4(4) 
2 
1(2) 
2 
1 
1 
3(5) 
7 
Fourth. 
2(3) 
1(2) 
1(4) 
8 
Fifth 
1(2) 
3 
Sixth 
2 
1 
Eighth 
1 
1 
Ninth 
1(10) 
1 
Tenth 
1(9) 
1 
Total 
1 
2 
2 
10 
2 
1 
4 
2 
24 
Table 5 shows that when cows abort in their third or later preg- 
nancy it usually occurs in a storm like that of 1905. Thus, in the 80 
animals tabulated, 10 abortions, or 41 per cent of all the abortions 
in third or later pregnancies, covering a period of 22 years, occurred 
in one year. Fifteen of the 24 abortions occurred during the third 
and fourth pregnancies, thus indicating strikingly the influence of the 
age of the animal upon abortion. 
ABORTION RECORD IN HERD B. 
In the following data of herd B the annual rate of abortion increases 
from the 12 per cent of herd A to 17 per cent. The increase occurs 
not in adults, but in heifers, and especially in those pregnant for the 
first time. 
Summary of abortions in herd B, May, 1909, to December, 1911. 
Total pregnancies 1, 206 
Total abortions 213 
Percentage of abortions 17 
Number aborting but once 167 
Number aborting twice 20 
Number aborting thrice 2 
Total number of cows aborting 189 
Abortions in first pregnancy, 99, or 46.5 per cent of all abortions and 50 per cent of first 
pregnancies. 
Abortions in second pregnancy, 70, or 33 per cent of all abortions and 34 per cent of 
second pregnancies. 
Abortions in third pregnancy, 26, or 12 per cent of all abortions. 
Abortions in fourth or later pregnancy, 18, or 8.5 per cent of all abortions. 
Repeated abortions. 
First and second pregnancy 15 
First, second, and third pregnancy 2 
Second and third pregnancy 2 
Third and fourth pregnancy 1 
Fourth and fifth pregnancy 1 
Fifth and sixth pregnancy 1 
Total 22 
