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In Vitro Culture Strategy for Oocytes from Early Antral Follicle in Cattle
Published on: July 8, 2020
[Reproductive performance in Herens cows from 2003 to 2007]
P Pfister1, T Kaufmann, E Fellay
1Wiederkäuerklinik der Universität Bern, Bern. patrizia.pfister@knp.unibe.ch
Schweizer Archiv Fur Tierheilkunde
|January 7, 2011
Summary
Reproductive performance in Herens cows is impacted by seasonal calving, leading to longer calving-to-conception intervals. Management and breeding practices require optimization for improved fertility in this unique cattle breed.
Area of Science:
- Veterinary Medicine
- Animal Science
- Reproductive Biology
Context:
- Herens cows exhibit higher fertility issue frequency at the University of Berne's Clinic for Ruminants.
- Analysis integrates Herens Breeding Book and Swiss Animal Traffic Database data.
- Breeder questionnaires explored management and care influences on reproductive outcomes.
Purpose:
- To assess the reproductive performance of the Herens cattle breed.
- To identify factors influencing fertility in Herens cows.
- To provide insights for optimizing breeding strategies.
Summary:
- Average calving to first insemination: 86 days; calving to conception: 146 days; inter-calving period: 431 days.
- Conception rate: 39.1%; fertility index: 1.87; 6.5% culled for fertility issues.
- Seasonal calving (80% Oct-Dec) due to traditional practices is linked to extended calving-to-conception intervals.
Impact:
- Highlights the need for improved reproductive management in Herens cattle.
- Informs breeding programs aiming to enhance fertility and productivity.
- Identifies seasonal calving as a key factor affecting reproductive efficiency.
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