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Short Communication

Nig. Vet. J.. 2019; 40(3): 186-189


VAGINAL MUCUS RESISTIVITY EVALUATION IN CATTLE: RELIABILITY OF THE SWINE ESTROUS DETECTOR PROBE DURING 16TH-HOUR INSEMINATION FOLLOWING OVULATION SYNCHRONIZATION

Linda Chinyere Agbugba,Adetomi Oyelola Oyewunmi,Adaeze Ezenwanyi Ibiam,Olufisayo Oluwadamilare Leigh.

Abstract
Accuracy of insemination timing is a key determinant of high pregnancy rates in livestock breeding stations. The estrous detector probes are a recent introduction into the Nigerian livestock farming sector. Many of these probes are species-labeled and they measure changes in the vaginal mucus resistivity (VMR) during the stages of the estrous cycle. With respect to size and shaft conformation, the Draminski® swine estrous detector probe (sEDP) is quite similar to the bovine type. We investigated the reliability of the sEDP at insemination time on two farms designated as FM A and FM B. Cows (Bunaji, n=20 per farm) were evaluated for VMR at 16th hour post standard OvSynch protocol, with concurrent insemination on FM B only. The difference in the mean VMR between FM A (221±24.36) Ohms and FM B (254±35.59) Ohms was not significant (p>0.05). Sixteen cows (80%) at FM B were later (day 70) confirmed pregnant via rectal palpation and all calved at term. These findings suggest consistency in VMR evaluated with sEDP at insemination as well as a high predictability for VMR associated with good pregnancy rates in dairy cattle. We conclude that Draminski® swine estrous detector probe is reliable in determining time of insemination in cattle breeding stations.

Key words: Swine estrous probe, vaginal mucus resistivity, insemination, OvSynch protocol, cattle


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