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Efficiency of vaginal electrical resistance measurements for oestrous detection and insemination in Rathi cows

Published online by Cambridge University Press:  18 August 2016

R. S. Meena ,
S. S. Sharma  and
G. N. Purohit
R. S. Meena
Affiliation:
Government Veterinary Hospital Dausa, Jaipur, Rajasthan, India
S. S. Sharma
Affiliation:
Department of Veterinary Obstetrics and Gynaecology, College of Veterinary and Animal Science, Rajasthan Agricultural University, Bikaner, Rajasthan, India
G. N. Purohit*
Affiliation:
Department of Veterinary Obstetrics and Gynaecology, College of Veterinary and Animal Science, Rajasthan Agricultural University, Bikaner, Rajasthan, India
*
Corresponding author. E-mail:[email protected]
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Abstract

The efficiency of vaginal electrical resistance (VER) measurements for oestrous detection was determined in four experiments. The mean VER during oestrus, metoestrus, dioestrus, pro-oestrus and anoestrus was 32·68±0·46, 41·26±1·17, 50·23±0·55, 43·52±0·54 and 55·86±0·57 ohms, respectively. There were significant (P < 0·01) differences between VERs at the different oestrous cycle stages, except those during pro-oestrus and metoestrus which were similar. Twelve cows were induced in oestrus using prostaglandin (PG) administration to study the changes in VER during the peri-oestrus period. VER values changed both on a within-day (P < 0·05) and day-today (P < 0·001) basis following PG administration. Of the eight cows that responded, all were classified as in oestrus by VER in comparison to five detected in oestrus by a teaser bull. There was a significant association between VER and probability of conception (P < 0·01). Conception rates were 84, 61 and 20% when animals were inseminated at VER ranges of 26 to 30, 31 to 35 and 36 to 40 ohms, respectively. In the final experiment VER was recorded each day at the time of milking in 22 cyclic cows for 60 days. Animals were inseminated when the VER declined below 35 ohms. Of these 22 cows five cows showed overt signs of oestrus and 11/22 (50%) became pregnant. Twenty-one days post AI, five cows returned to oestrus, based on low VER, whereas 17 continued to show a high VER but eight of these (8/17) were subsequently classified as non-cyclic. It is concluded that VER can effectively be used for oestrus detection and identification of the optimum time for insemination but has limited value for pregnancy diagnosis. Cows should be inseminated when a VER reading of less than 36 ohms is recorded.

Keywords

artificial inseminationelectrical resistanceoestrusprostaglandinvagina
Type
Reproduction
Information
Animal Science , Volume 76 , Issue 3 , June 2003 , pp. 433 - 437
Copyright
Copyright © British Society of Animal Science 2003

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References

Aboul Ela, M. B., McDonald, D. C., Lindsay, D., Topps, J. H. and Mani, R. 1982. The association between changes in the intravaginal electrical resistance and in vitro measurement of vaginal mucus electrical resistivity in cattle. Animal Reproduction Science 5: 323–328.Google Scholar
Bartlewski, P. M., Beard, A. P. and Rawlings, N. C. 1999. The relationship between vaginal mucous impedance and serum concentrations of oestradiol and progesterone throughout the sheep estrous cycle. Theriogenology 51: 813–827.Google Scholar
Canfield, R. W. and Bulter, W. R. 1989. Accuracy of predicting the LH surge and optimal insemination time in Holstein heifers using a vaginal resistance probe. Theriogenology 31: 835–842.Google Scholar
Chauhan, F. S., Magongo, F. O. K., Kessy, B. M. and Gombe, S. 1986. Effect of intra vulvo sub-mucosal cloprostenol injections on hormonal profile and fertility in subestrus cattle. Theriogenology 26: 69–75.Google Scholar
Dusza, L., Opalka, M., Kaminska, B., Kaminski, T. and Ciereszko, R. E. 1996. The relationship between electrical resistance of vaginal mucus and plasma hormonal parameters during periestrus in sows. Theriogenology 45: 1491–1503.Google Scholar
Elving, L., Pieterse, M. C. and Vernooy, A. M. 1983. A prospective study of the usefulness of an intra vaginal electric resistance meter for estrus detection in cattle. Tijdschrift voor Diergeneeskunde 108: 85–90.Google Scholar
Feldman, F., Aizinbud, E., Schindler, H. and Broda, H. 1978. The electrical conductivity inside the bovine vaginal wall. Animal Production 26: 61–65.Google Scholar
Foote, R. H., Oltenacu, E. A. B., Millinger, J., Scott, M. K. and Marshall, R. H. 1979. Pregnancy rate in dairy cows inseminated on the basis of electronic probe measurements. Journal of Dairy Science 62: 69–73.CrossRefGoogle ScholarPubMed
Gartland, P., Schiavo, J., Hall, C. E., Foote, R. H. and Scott, N. R. 1976. Detection of estrous in dairy cows by electrical measurement of vaginal mucus and milk progesterone. Journal of Dairy Science 59: 982–985.Google Scholar
Gupta, K. A. and Purohit, G. N. 2001. Use of vaginal electrical resistance (VER) to predict oestrus and ovarian activity, its correlation with plasma progesterone and use for insemination in buffaloes. Theriogenology 56: 235–245.Google Scholar
Gupta, S. K., Mohan, G. and Verma, R. P. 1981. Electrical conductance of vaginal mucosa in crossbred cows during oestrous cycle and pregnancy. Indian Journal of Animal Reproduction 1: 113.Google Scholar
Khozei, V. E. 1983. Artificial insemination of replacement heifers. Veterinariya, Moscow, USSR 6: 49–50.Google Scholar
Leidl, W. and Stolla, R. 1976. Measurement of electric resistance of the vaginal mucus as an aid for heat detection. Theriogenology 6: 237–249.Google Scholar
Maatje, K., Loeffler, S. H. and Engel, B. 1997. Predicting optimal time of insemination in cows that show visual signs of oestrus by estimating onset of oestrus with pedometers. Journal of Dairy Science 80: 1098–1105.Google Scholar
McCaughey, M. 1981. Pregnancy diagnosis in cattle by measuring vaginal electrical resistance. Veterinary Research Communications 5: 185–190.Google Scholar
Peters, A. R. 1989. Changes in electrical resistance of the vaginal mucosa in prostaglandin treated cows. Veterinary Record 124: 505–507.Google Scholar
Purohit, G. N., Datt, M., Sharma, S. S. and Upadhyaya, R. C. 2000. Estradiol profile of Rathi cattle during the estrous cycle. Indian Journal of Animal Reproduction 21: 6–7.Google Scholar
Purohit, G. N. and Gupta, K. A. 2000. Efficiency of vaginal electrical resistance for inseminating cows. Livestock International 4: 12–14.Google Scholar
Stokhof, S. J. H., Soede, N. M. and Kemp, B. 1996. Vaginal mucus conductivity as measured by the Walsmeta MKIV does not accurately predict the moment of ovulation or the optimum time for insemination in sows. Animal Reproduction Science 41: 305–310.CrossRefGoogle Scholar