| Autor: |
Santos-Jimenez, Zurisaday, Martínez-Ros, Paula, Encinas, Teresa, Morales-Cruz, Juan Luis, Guerrero-Gallegos, Hugo Zuriel, Gonzalez-Avalos, Ramiro, Gonzalez-Bulnes, Antonio, Guillen-Muñoz, Juan Manuel |
| Předmět: |
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| Zdroj: |
Veterinary Sciences; Dec2022, Vol. 9 Issue 12, p663, 9p |
| Abstrakt: |
Simple Summary: The application of treatments based on controlled dose progesterone intravaginal devices (CIDR) plus equine chorionic hormone (eCG) has been favored in recent years for the induction and/or synchronization of estrus activity and ovulation in the breeding and the non-breeding seasons. In anestrous mature ewes, short-term treatments are equally effective as long-term treatments, but information on the effects of such treatments for maiden sheep is scarce. The objective of this investigation was to determine the ovarian response, fertility, and prolificacy of nulliparous sheep when compared to multiparous sheep after a short-term (7 days) CIDR/eCG treatment which was administered during the non-breeding season. All the multiparous sheep, whereas only 54% of the nulliparous ewes, showed signs of estrus. However, 81.8% of the multiparous sheep and 100% of the nulliparous ewes ovulated. Fertility was also low after short-term progesterone treatments during the anestrous season in maiden sheep (30.8 vs. 72.7% in multiparous ewes). Such results indicate significant differences in the response to CIDR/eCG protocols for induction and synchronization of estrus and ovulation between nulliparous and multiparous sheep during the non-breeding season. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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