Related Experiment Videos
[Comparative studies of superovulation in high-producing cows].
1Forschungszentrum für Tierproduktion Dummerstorf-Rostock der Akademie der Landwirtschafts-wissenschaften der DDR.
Archiv Fur Experimentelle Veterinarmedizin
|January 1, 1990
Summary
Follicle-stimulating hormone-pregnant mare serum gonadotropin (FSH-PG) superovulation treatment is superior for high-yielding cows. This method significantly increases transferable embryos compared to other gonadotropin regimens.
Area of Science:
- Veterinary Medicine
- Animal Reproduction
- Endocrinology
Background:
- Superovulation is crucial for efficient cattle breeding.
- Optimizing superovulation protocols enhances embryo yield.
- Previous methods utilized pregnant mare serum gonadotropin (PMSG).
Purpose of the Study:
- To compare the efficacy of three different superovulation treatments in high-yielding cows.
- To determine the optimal gonadotropin regimen for maximizing embryo production.
- To evaluate ovarian response and transferable embryo yield for each treatment.
Main Methods:
- Three treatment groups were established: PMSG-PG (1), PMSG-PG-anti-PMSG (2), and FSH-PG (3).
- Treatments were administered under production conditions to high-yielding cows.
- Ovarian reactions (corpora lutea) and transferable embryo numbers were quantified.
Main Results:
- FSH-PG (3) demonstrated significantly superior results compared to the other two regimens (P < 0.01; 0.001).
- FSH-PG yielded positive ovarian reactions in 92.0% of cases, with an average of 7.0 +/- 6.3 transferable embryos.
- PMSG-PG (1) resulted in 75.5% positive reactions and 3.2 +/- 2.97 embryos; PMSG-PG-anti-PMSG (2) yielded 85.5% and 4.3 +/- 3.9 embryos.
Conclusions:
- The FSH-PG regimen is the most effective for superovulation in high-yielding cattle.
- Standardized protocols using FSH-PG (3) and PMSG-PG-anti-PMSG (2) are recommended for cattle embryo transfer practices.
- Optimized superovulation enhances reproductive efficiency in breeding programs.