YENi, Deniz Afyon Kocatepe University, ANS Campus - Faculty of Veterinary Medicine - Department of Reproduction and Artificial Insemination, Turkey , AVDATEK, Fatih Afyon Kocatepe University, ANS Campus - Faculty of Veterinary Medicine - Department of Reproduction and Artificial Insemination, Turkey , ACAR, Duygu BAKi Afyon Kocatepe University, ANS Campus - Faculty of Veterinary Medicine - Department of Gynecology and Obstetrics, Turkey , GUNDOGAN, Mustafa Afyon Kocatepe University, ANS Campus - Faculty of Veterinary Medicine - Department of Reproduction and Artificial Insemination, Turkey

Fertility compairing with respect to oestrus signs at the time of artificial insemination in cows

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The present study was conducted to compare the effect of oestrus signs on fertility and to investigate which of the oestrus signs have positive effect on pregnancy success in Brown Swiss (BS) and Simmental (S) cows under field conditions alternatively. The clinical findings of spontaneous oestrus signed cows were examined by visual observation and some clinical tests and then, all cows were artificially inseminated by frozen-thawing semen. The overall mean values of pregnancy rate were obtained as 69.09±6.29 % and 65.12±7.35 % in BS and S cows respectively, and breed effect was no. Average the highest rate of pregnancy (92.0% for BS and 82.68% for S) was achieved with inseminated range of 14.0- 18.0 mm in ovulatory follicle sized cows, and breed effect was no, either. Also the extent that significantly (P 0.01) high fertility was observed to increase in rectal and vaginal temperature, vulva edema, vaginal hyperemia and cervical mucus ferning. The ovulatory follicle was located more often (P 0.01) on the right (67.27%, BS and 60.47%, S) than the left ovary (32.73%, BS and 39.53%, S), but there was no effect of location of the ovulatory follicle on the pregnancy rate. Nonetheless, it was observed positively common correlations among rectal and vaginal temperatures (P 0.01), vaginal hyperemia both ferning of cervical mucus and pregnancy rate (P 0.01), and also ferning of cervical mucus and pregnancy rate (P 0.05) in all animals. It was concluded that fertility was bigger spontaneously oestrus signed and inseminated cows of which vulva edema, vaginal hyperemia and ferning of cervical mucus were maximum and ovulatory follicle size was moderate. Therefore, should be behavioral oestrus signs evaluated with ovulatory follicle size and ferning of cervical mucus, fertility may be improved in case of optimizing insemination time in cattle.

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Cow , fertility , follicle , insemination , mucus ferning , oestrus

Kocatepe Veterinary Journal

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