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Indian Journal of Pure & Applied Biosciences (IJPAB)
Year : 2020, Volume : 8, Issue : 3
First page : (459) Last page : (462)
Article doi: : http://dx.doi.org/10.18782/2582-2845.8171

A Comparative study of Estradiol Level by various Estrus synchronization protocols in Kilakarsal ewes during the breeding season

M. Sundara Vinayaki*
*Assistant Professor,
Department of Veterinary Physiology and Biochemistry,
Veterinary College and Research Institute, Tirunelveli-627 358
TAMILNADU VETERINARY AND ANIMAL SCIENCES UNIVERSITY
*Corresponding Author E-mail: mvinayagi@gmail.com
Received: 13.05.2020  |  Revised: 20.06.2020   |  Accepted: 26.06.2020 

 ABSTRACT

To produce lambs consistently throughout the year in an accelerated lambing system, the use of exogenous hormones can be utilized in order to induce a synchronized estrus and stimulate cyclicity during the anestrous period.  This can be achieved by either lengthening or reducing the duration of the estrous cycle by administration of exogenous progesterone (P4) or prostaglandin (PG).  Gonadotropin-releasing hormone (GnRH)  and Nanao GnRH may also be incorporated into treatment protocols to assist in initiating hormonal events necessary to synchronize estrous cycles, such as estrus and ovulation, especially in anestrous ewes The objective of this study was to determine the effects of various estrous synchronization protocols utilizing the estrus synchronization protocols for Estradiol Level during reproductive cycle in Kilakarsal ewes at Breeding season Blood samples were collected via jugular venipuncture on the day of CIDR insertion.On the day of CIDR removal.On the day of estrum.On the day of mating and  On the 70th day of pregnancy.. Serum was analyzed to estradiol concentration  which was estimated by direct immunoenzymatic  method using ELISA kit (RIA). From the values recorded on the day of estrum though no significant difference was observed between any of the treatment groups, the control showed the lowest value of estradiol which was significantly (P<0.05) different from that of the other groups.

Keywords: Gonadotropin-releasing hormone (GnRH), Nanao GnRH, Ewes

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Vinayaki, M.S. (2020). A Comparative study of Estradiol Level by various Estrus synchronization protocols in Kilakarsal ewes during the breeding season, Ind. J. Pure App. Biosci. 8(3), 459-462. doi: http://dx.doi.org/10.18782/2582-2845.8171