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Synchronization of Estrus in Field Conditions Using Progestagen Sponge, GnRH, and PGF2╬▒ in Barki Ewes during Breeding Season

Reham S. Waheeb, Gamal A. El-amrawi, Kamal K. Metwelly, Amr M. El-sabbagh.

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  • Abstract
    This study was conducted to study reproductive performance of Barki ewes subjected to three estrous synchronization programs in field conditions during breeding season. For this purpose, 36 cycling ewes were divided into 4 groups according to the program assigned: Group SeCG (n=10): ewes received intravaginal progesterone sponge (loaded with 40 mg Flugestone acetate, Chrono-gest«- Intervet International) for 7 days. At time of sponge removal, each ewe received i.m injection of 500 IU eCG (Folligon«, Intervet International); Group PG (n=10): ewes received double injections of 250╬╝g Cloprostenol (PGF2╬▒ analogue, Estrumate«, Intervet International) with 11 days interval; Group GPG: this group included 6 ewes, on day 0 each animal received 4╬╝g Buserelin by i.m injection (GnRH analogue- Receptal«, Intervet International), on day 7 they received 250╬╝g Cloprostenol and 4╬╝g Buserelin by i.m injection; Group C: 10 ewes served as control group that did not receive any treatment. Results showed that estrus induction rate was highest in SeCG group that was recorded at 100%, while it was 90%, 60%, and 50% for PG, C and GPG respectively. Estrus synchrony was more uniform in SeCG group as 70% of ewes exhibited estrus after 24 hrs from end of treatment, while 66.7% ewes in GPG group showed signs of estrus after 36 hrs from end of treatment. Conception rate was highest in GPG group that was recorded at 100%, while it was 90%, 88.9%, and 83.3% for SeCG, PG, and C respectively. Conclusion, from results we conclude that intravaginal progesterone sponge+500 IU eCG (SeCG) protocol is convenient for estrous synchronization of ewes in field conditions during breeding season with acceptable estrus induction and conception rates.

    Key words: estrous synchronization, progestagen sponge, breeding season


     
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    How to Cite this Article
    Pubmed Style

    Waheeb RS, El-amrawi GA, Metwelly KK, El-sabbagh AM. Synchronization of Estrus in Field Conditions Using Progestagen Sponge, GnRH, and PGF2α in Barki Ewes during Breeding Season. AJVS. 2017; 54(2): 1-4. doi:10.5455/ajvs.273830



    Web Style

    Waheeb RS, El-amrawi GA, Metwelly KK, El-sabbagh AM. Synchronization of Estrus in Field Conditions Using Progestagen Sponge, GnRH, and PGF2α in Barki Ewes during Breeding Season. www.scopemed.org/?mno=273830 [Access: October 24, 2017]. doi:10.5455/ajvs.273830



    AMA (American Medical Association) Style

    Waheeb RS, El-amrawi GA, Metwelly KK, El-sabbagh AM. Synchronization of Estrus in Field Conditions Using Progestagen Sponge, GnRH, and PGF2α in Barki Ewes during Breeding Season. AJVS. 2017; 54(2): 1-4. doi:10.5455/ajvs.273830



    Vancouver/ICMJE Style

    Waheeb RS, El-amrawi GA, Metwelly KK, El-sabbagh AM. Synchronization of Estrus in Field Conditions Using Progestagen Sponge, GnRH, and PGF2α in Barki Ewes during Breeding Season. AJVS. (2017), [cited October 24, 2017]; 54(2): 1-4. doi:10.5455/ajvs.273830



    Harvard Style

    Waheeb, R. S., El-amrawi, G. A., Metwelly, K. K. & El-sabbagh, A. M. (2017) Synchronization of Estrus in Field Conditions Using Progestagen Sponge, GnRH, and PGF2α in Barki Ewes during Breeding Season. AJVS, 54 (2), 1-4. doi:10.5455/ajvs.273830



    Turabian Style

    Waheeb, Reham S., Gamal A. El-amrawi, Kamal K. Metwelly, and Amr M. El-sabbagh. 2017. Synchronization of Estrus in Field Conditions Using Progestagen Sponge, GnRH, and PGF2α in Barki Ewes during Breeding Season. Alexandria Journal of Veterinary Sciences, 54 (2), 1-4. doi:10.5455/ajvs.273830



    Chicago Style

    Waheeb, Reham S., Gamal A. El-amrawi, Kamal K. Metwelly, and Amr M. El-sabbagh. "Synchronization of Estrus in Field Conditions Using Progestagen Sponge, GnRH, and PGF2α in Barki Ewes during Breeding Season." Alexandria Journal of Veterinary Sciences 54 (2017), 1-4. doi:10.5455/ajvs.273830



    MLA (The Modern Language Association) Style

    Waheeb, Reham S., Gamal A. El-amrawi, Kamal K. Metwelly, and Amr M. El-sabbagh. "Synchronization of Estrus in Field Conditions Using Progestagen Sponge, GnRH, and PGF2α in Barki Ewes during Breeding Season." Alexandria Journal of Veterinary Sciences 54.2 (2017), 1-4. Print. doi:10.5455/ajvs.273830



    APA (American Psychological Association) Style

    Waheeb, R. S., El-amrawi, G. A., Metwelly, K. K. & El-sabbagh, A. M. (2017) Synchronization of Estrus in Field Conditions Using Progestagen Sponge, GnRH, and PGF2α in Barki Ewes during Breeding Season. Alexandria Journal of Veterinary Sciences, 54 (2), 1-4. doi:10.5455/ajvs.273830



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