E-ISSN 2536-9520 | ISSN 1110-2047
 
2026, Vol: 90
90Current Volume Online First Archive Aims and Scope Abstracting & Indexing Most Accessed Articles Most Downloaded Articles Most Cited Articles

Original Article
Online Published: 01 May 2026
 


Effect of Different Estrus Synchronization Protocols on Reproductive Efficiency in Ewes

Mohammed H. Suleiman, Hani M. Al-rawi.


Abstract
Estrus synchronization is an important reproductive management tool in sheep production, as it facilitates controlled breeding and improves reproductive efficiency. This study evaluated two alternative estrus synchronization protocols compared with the conventional controlled internal drug release (CIDR) method in ewes. 24 ewes were randomly assigned to three groups: CIDR for 14 days followed by PMSG, double injections of prostaglandin F2α (PGF2α) followed by PMSG, and a GnRH–PGF2α protocol followed by PMSG. Estrus response, estrus duration, time to estrus onset, pregnancy rate, and conception rate were evaluated. No significant differences were observed among protocols in estrus response or time to estrus onset (P > 0.05). Estrus duration differed significantly (P < 0.05), with the GnRH group showing the longest duration. Pregnancy and conception rates were significantly higher in the CIDR group compared with the other treatments. In conclusion, although CIDR showed superior reproductive performance, alternative protocols such as double PGF2α may represent practical and cost-effective options under field conditions.

Key words: Prostaglandin F2α, GnRH, PMSG, CIDR


 
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Pubmed Style

Suleiman MH, Al-rawi HM. Effect of Different Estrus Synchronization Protocols on Reproductive Efficiency in Ewes. AJVS. 2026; 90(0): 231-237. doi:10.5455/ajvs.316935

Web Style

Suleiman MH, Al-rawi HM. Effect of Different Estrus Synchronization Protocols on Reproductive Efficiency in Ewes. https://www.alexjvs.com/?mno=316935 [Access: July 27, 2026]. doi:10.5455/ajvs.316935

AMA (American Medical Association) Style

Suleiman MH, Al-rawi HM. Effect of Different Estrus Synchronization Protocols on Reproductive Efficiency in Ewes. AJVS. 2026; 90(0): 231-237. doi:10.5455/ajvs.316935


Vancouver/ICMJE Style

Suleiman MH, Al-rawi HM. Effect of Different Estrus Synchronization Protocols on Reproductive Efficiency in Ewes. AJVS. (2026), [cited July 27, 2026]; 90(0): 231-237. doi:10.5455/ajvs.316935


Harvard Style

Suleiman, M. H. & Al-rawi, . H. M. (2026) Effect of Different Estrus Synchronization Protocols on Reproductive Efficiency in Ewes. AJVS, 90 (0), 231-237. doi:10.5455/ajvs.316935


Turabian Style

Suleiman, Mohammed H., and Hani M. Al-rawi. 2026. Effect of Different Estrus Synchronization Protocols on Reproductive Efficiency in Ewes. Alexandria Journal of Veterinary Sciences, 90 (0), 231-237. doi:10.5455/ajvs.316935


Chicago Style

Suleiman, Mohammed H., and Hani M. Al-rawi. "Effect of Different Estrus Synchronization Protocols on Reproductive Efficiency in Ewes." Alexandria Journal of Veterinary Sciences 90 (2026), 231-237. doi:10.5455/ajvs.316935


MLA (The Modern Language Association) Style

Suleiman, Mohammed H., and Hani M. Al-rawi. "Effect of Different Estrus Synchronization Protocols on Reproductive Efficiency in Ewes." Alexandria Journal of Veterinary Sciences 90.0 (2026), 231-237. Print. doi:10.5455/ajvs.316935


APA (American Psychological Association) Style

Suleiman, M. H. & Al-rawi, . H. M. (2026) Effect of Different Estrus Synchronization Protocols on Reproductive Efficiency in Ewes. Alexandria Journal of Veterinary Sciences, 90 (0), 231-237. doi:10.5455/ajvs.316935




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    The Alexandria Journal of Veterinary Sciences (AJVS) Official Journal of Faculty of Veterinary Medicine, Alexandria University   ISSN: 1110-204 ... Read more.



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    Egypt.

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