STIMULATING REPRODUCTIVE FUNCTIONS AT ACYCLIC COWS BY OVSYNCH AND SELECT SYNCH PROTOCOLS

Ion Valeriu Caraba

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 PGF and continued 5 to 7 days.

Cows were inseminated at 8-12 hours after estrous detection. 60 days after the artificial insemination, 8 cows (44 %) of the first group and 6 cows (42.9%) of the second batch were diagnosed as pregnant. These two protocols of inducing and synchronizing estrous are very effective in acyclic cows.


Keywords


acyclic cows, Ovsynch, Select Synch.

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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, JM, RR Salverson, and CE Marshall. 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.

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


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LUCRARI STIINTIFICE ZOOTEHNIE SI BIOTEHNOLOGII (SCIENTIFIC PAPERS ANIMAL SCIENCE AND BIOTECHNOLOGIES)

ISSN print 1841 - 9364
ISSN online 2344 - 4576
ISSN-L  1841 - 9364
(former ISSN 1221-5287, E-ISSN 1841-9364)

PUBLISHER: AGROPRINT Timisoara, Romania
PAPER ACCESS: Full text articles available for free
FREQUENCY: Semiannual
PUBLICATION LANGUAGE: English
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Banat´s University of Agricultural Sciences and Veterinary Medicine "King Michael I of Romania" from Timisoara
Bioengineering Faculty of Animal Resources
300645, Timişoara, Calea Aradului 119, Romania

E-mail: spasb [at] animalsci-tm.ro
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