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Computer-assisted semen analysis and its utility for profiling boar semen samples.

¹Minitube of America, Inc., Mt. Horeb, WI 53572, USA. bdidion@minitube.com

|August 30, 2008

Summary

Computer-Assisted Semen Analysis (CASA) objectively evaluates swine sperm but showed no correlation with fertility in this study. Future research should address study limitations to better link CASA parameters to AI success.

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Area of Science:

Animal Science
Reproductive Biology
Veterinary Medicine

Background:

Successful swine artificial insemination (AI) relies on accurate semen evaluation.
Key semen parameters include sperm motility, morphology, and concentration.
Computer-Assisted Semen Analysis (CASA) offers objective semen evaluation.

Purpose of the Study:

To objectively evaluate swine semen using CASA.
To assess the correlation between CASA parameters and AI fertility outcomes.
To identify factors influencing the relationship between semen quality and reproductive success.

Main Methods:

Evaluated 3077 swine semen collections using CASA.
Used a subset of semen doses for single-sire AI in 6266 females over 6 months.

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Fitted fertility data with models accounting for farm, line, boar, parity, and mating/boar age.

Main Results:

No correlation was found between CASA semen unique motion parameters and fertility.
Potential reasons for the lack of correlation include sperm concentration, insemination frequency, and limited females per boar.
Semen evaluation via CASA did not predict fertility in this specific swine AI program.

Conclusions:

CASA is an objective tool for swine semen evaluation.
The current study did not establish a direct link between CASA parameters and AI fertility.
Future studies require adjustments for sperm concentration, insemination protocols, and boar allocation to clarify CASA's predictive value.