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Related Experiment Video

Updated: Jun 5, 2026

In Vitro Culture Strategy for Oocytes from Early Antral Follicle in Cattle

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.

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Cryopreservation of Preimplantation Embryos of Cattle, Sheep, and Goats

Cryopreservation of Preimplantation Embryos of Cattle, Sheep, and Goats

Published on: August 5, 2011

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.