Stimulating Reproductive Functions at Acyclic Cows by Ovsynch and Select Synch Protocols

Authors

  • Ion Carabă Banat’s University of Agricultural Sciences and Veterinary Medicine, Faculty of Animal Science and Biotechnologies, Timisoara-300645, Calea Aradului, 119, Romania
  • Nicolae Păcală Banat’s University of Agricultural Sciences and Veterinary Medicine, Faculty of Animal Science and Biotechnologies, Timisoara-300645, Calea Aradului, 119, Romania
  • Marioara Nicula Banat’s University of Agricultural Sciences and Veterinary Medicine, Faculty of Animal Science and Biotechnologies, Timisoara-300645, Calea Aradului, 119, Romania
  • Dorel Dronca Banat’s University of Agricultural Sciences and Veterinary Medicine, Faculty of Animal Science and Biotechnologies, Timisoara-300645, Calea Aradului, 119, Romania
  • Silvia Erina Banat’s University of Agricultural Sciences and Veterinary Medicine, Faculty of Animal Science and Biotechnologies, Timisoara-300645, Calea Aradului, 119, Romania

Keywords:

acyclic cows, Ovsynch, Select Synch

Abstract

The purpose of our work was to compare the efficiency of two programs for the induction and synchronization of estrous and ovulation in acyclic cows (Ovsynch and Select Synch).

To the first batch of 18 cows we have given 2ml Cystorelin (100 mcg GnRH) on day 0, on day 7th 2ml Estrumate (500 mcg of Cloprostenol, on the ninth day we administered 2ml Cystorelin (100 mcg GnRH), after 16 hours we conducted artificial insemination.

To the second group of 14 cows we have given 2ml Cystorelin (100 mcg GnRH) on day 0, on day 7th we administered 2ml Estrumate (500 mcg of cloprostenol), heat detection was made at 24-48 hours after PGF2α and continued 5 to 7 days.

Cows were inseminated at 8-12 hours after estrous detection. 60 days after the artificial insemination, 11 cows (44%) of the first group and 9 cows (41%) of the second batch were diagnosed as pregnant. These two protocols of inducing and synchronizing estrous are very effective in acyclic cows.

References

Stevenson, J. S., Johnson, S. K., Medina-Britos, M. A., Richardson, A. M., Lamb, G. C., Resynchronization of estrus in cattle of unknown pregnancy status using estrogen, progesterone, or both, J. Anim. Sci.,2003, 81, 1682–1692.

DeJarnette, J. M, Salverson, R. R., Marshall, C. E., Incidence of premature estrus in lactating dairy cows and conception rates to standing estrus or fixed-time inseminations after synchronization using GnRH and PGF, Anim. Reprod. Sci., 2001, 67, 27-35.

Patterson, D. J., Stegner, J. E., Perry, G. A., Kojima, F. N., Smith, M. F., Emerging protocols to synchronize estrus in replacement beef heifers and postpartum cows. In: The Range Beef Cow Symposium XVII Proceedings, Casper, Wyoming. University of Missouri, Columbia, 2001.

Pacala, N., Corin, N., Bencsik I., Dronca, D., Cean, A., Boleman, A., Caraba, V., Papp S., Stimulation of the reproductive functions at acyclic cows by Ovsynch and PRID/ eCG, Anim. Sci. Biotech., 2010, 43, 23-27.

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Published

2023-09-12

Issue

Vol. 51 No. 1 (2018): Scientific Papers: Animal Science and Biotechnologies

Section

Biotechnologies

License

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This work is licensed under a Creative Commons Attribution 4.0 International License.