Related Experiment Videos
Summary
Superovulation induction using Pregnant Mare Serum Gonadotropin (PMSG) in culled cows yielded varying success rates based on the reason for culling. Cows culled for low performance or udder disease showed higher superovulation and embryo recovery rates compared to infertile cows.
Area of Science:
- Veterinary Medicine
- Reproductive Biology
- Embryo Technology
Context:
- Culling of dairy cows for various reasons (low performance, udder disease, infertility, age) presents an opportunity for reproductive research.
- Superovulation protocols aim to maximize embryo yield from valuable genetic stock.
Purpose:
- To evaluate the efficacy of Pregnant Mare Serum Gonadotropin (PMSG) for superovulation in culled cows.
- To determine the correlation between reasons for culling and superovulation/embryo recovery success rates.
Summary:
- 134 culled cows were treated with PMSG (2000-4000 IU) to induce superovulation, with embryo collection post-mortem.
- Cows culled for low performance (76.3%) and udder disease (70.6%) showed higher superovulation rates than infertile cows (53.1%).
- Embryo gain and quality varied, with infertile cows yielding a higher proportion of transferable embryos (66.9%), despite lower overall egg numbers.
Impact:
- Identifies specific culling reasons associated with better superovulation response, informing donor selection for embryo transfer programs.
- Provides data on embryo yield and quality in culled populations, potentially improving resource utilization in bovine reproduction.
- Suggests that even cows culled for infertility can contribute viable embryos, highlighting the potential of utilizing diverse donor groups.