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In Vitro Fertilization

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

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Published on: July 8, 2020

Factors That Optimize Reproductive Efficiency in Dairy Herds with an Emphasis on Timed Artificial Insemination

Carlos Eduardo Cardoso Consentini¹, Milo Charles Wiltbank², Roberto Sartori¹

¹Department of Animal Sciences, Luiz de Queiroz College of Agriculture of University of São Paulo (ESALQ/USP), Piracicaba, SP 13418-900, Brazil.

Animals : an Open Access Journal From MDPI

|January 28, 2021

Summary

Achieving high 21-day pregnancy rates in dairy cows requires optimizing reproductive management, including timed artificial insemination (TAI) protocols. Implementing systematic programs boosts herd profitability and milk production.

Keywords:

cattle dairy cows fertility management reproductive tools timed-AI

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Published on: April 28, 2007

Area of Science:

Dairy cattle reproduction
Animal science
Agricultural economics

Background:

Reproductive efficiency is crucial for dairy herd profitability, influencing calving interval and days in milk.
Factors affecting reproductive performance include management, nutrition, genetics, and cow comfort.
Increasing 21-day pregnancy rates necessitates improvements in service rate and pregnancy per artificial insemination (P/AI).

Purpose of the Study:

To present scientific findings supporting the improvement of reproductive efficiency in dairy operations.
To demonstrate practical implementation of strategies for enhanced reproductive performance.
To define and explain the concept of the "high fertility cycle" in dairy cows.

Main Methods:

Review and synthesis of scientific literature on dairy cattle reproductive management.
Analysis of timed artificial insemination (TAI) protocols and presynchronization programs.
Evaluation of management strategies impacting fertility and milk production.

Main Results:

Certain TAI protocols and presynchronization programs can increase P/AI, sometimes exceeding natural estrus fertility.
Systematic reproductive management programs utilizing efficient TAI can lead to high reproductive indexes.
Optimized management strategies contribute to healthy cows with high milk production, termed "the high fertility cycle".

Conclusions:

Implementing advanced TAI protocols and systematic management is key to improving dairy herd reproductive efficiency.
The "high fertility cycle" integrates high reproductive performance with sustained milk production.
Practical application of these concepts can significantly enhance profitability in commercial dairy operations.