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Articles | Volume 68, issue 2
Articles | Volume 68, issue 2
https://doi.org/10.5194/aab-68-425-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/aab-68-425-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 68, issue 2
Original study
 | 
01 Jul 2025
Original study |  | 01 Jul 2025

Effects of intravaginal progesterone devices and Booroola fecundity (FecB) gene on the ovarian responses and reproductive indices of Qezel ewes following estrus synchronization and laparoscopic insemination during the breeding season

Mohammad Allah-Dadi, Mohsen Eslami, Farhad Farrokhi-Ardabili, and Sina Bahmani

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Short summary
We examine the effects of Booroola fecundity (FecB) gene introgression into the genome of a less prolific breed on the timing and distribution of ovulations after estrus synchronization with progestogen devices (controlled internal drug release, CIDR, vs. vaginal sponge) and reproductive indices after insemination. CIDR-treated ewes ovulated earlier than sponge-receiving ewes. FecB carriers ovulated smaller follicles than non-carriers. Reproductive indices were improved by the introgression of FecB in ewes.
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