Effect of seasons and breed on the percentage of infertility among cows in Measan

الملخص EN

Throug a complete year a 1000 cows were subjected to asexual health examination two hundred and ten cases of affection with infertility problems were discovered in local Iraqi cows (Al-Jenubi) and their crosses with Fresian .It was found that 88 cows (41.

9 %) as anestruse, they were 28 cows (l3.

33 %) local cows and 60 cows (28.

57 %) crosses cows and .the percentage of anestrus did not affected by certain seasonal trend, and 49 cows (23.

33 %) were affected by repeat breeder, l7 cows (8.

09 %) of them were local cows and 32 cows (l5.

23 %) were crosses cows and the higher percentage of repeat breeders was in summer season.

Uterine infection were 73 cows (34.76%) cases devided as 45 cows (2l.

42 %)local cows and 28cows (l3.

33%) crosses cows and they were not affected by acertianseason with the exception of their highest incidence in winter.

the results shows .

that the percentage of cross cows higher than the percentage of local cows signilicantly(p < 0.

0l).

There is not significant correlation between seasons and affection cows with infertility .But the results shows that the local breed is more resistant to infertility problems than cross breed.