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Ovsynch synchronization and fixed-time insemination in goats.
W Holtz1, B Sohnrey, M Gerland
1Institute for Animal Husbandry and Genetics, Goettingen University, Albrecht-Thaerweg 3, 37075 Goettingen, Germany. wholtz@gwdg.de
Theriogenology
|March 14, 2008
Summary
The Ovsynch protocol offers a viable alternative for fixed-time artificial insemination in goats, showing comparable kidding rates to traditional sponge-eCG treatments. Optimizing its use by excluding does with luteal issues can significantly improve conception success.
Area of Science:
- Veterinary Reproduction
- Animal Science
- Reproductive Endocrinology
Background:
- Fixed-time artificial insemination (FTAI) protocols are crucial for efficient goat breeding.
- Traditional methods like cronolone vaginal sponges with equine chorionic gonadotropin (eCG) have limitations.
- The Ovsynch protocol presents a potential alternative for estrus synchronization in goats.
Purpose of the Study:
- To compare the efficacy of the Ovsynch protocol against the traditional sponge-eCG treatment for FTAI in Boer goats.
- To evaluate estrus response, ovulation synchronization, and subsequent reproductive outcomes.
Main Methods:
- Two groups of 24 Boer does each were treated with either Ovsynch or sponge-eCG.
- Estrus was monitored using aproned males; follicular development and corpus luteum quality were assessed via ultrasonography and progesterone levels.
- LH surge synchronization and insemination timing were standardized.
Main Results:
- Both protocols induced estrus, with Ovsynch showing tighter LH surge synchronization.
- Kidding rates (58% Ovsynch vs. 46% sponge) and prolificacy were similar, though Ovsynch had fewer does with premature luteal regression.
- Excluding does with low progesterone or luteal regression improved Ovsynch kidding rates to 87.5%.
Conclusions:
- The Ovsynch protocol is a useful alternative to sponge-eCG for FTAI in goats during the breeding season.
- Careful selection of does or further protocol refinement may be necessary to maximize kidding rates.
- Ovsynch offers improved LH surge synchronization compared to traditional methods.
