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Genetics of Male Fertility Study with Kansas State University We Need Your Help!

A team of researchers at Kansas State University are venturing into uncharted territory in beef cattle genetics: male fertility.  ASA is helping KSU gather data from our members to study various genetic predictors of male fertility. Breeders with breeding soundness exam records or individual pregnancy records on registered or commercial cows bred to registered bulls can send data to This email address is being protected from spambots. You need JavaScript enabled to view it..  All data must be submitted electronically on a spreadsheet. 

Download a template spreadsheet here:  Excel     CSV



BSE records:

Herd and location (can be dummy ID, doesn’t matter to us as long as it’s specific and consistent)


Registration Number

Morphology (including specific abnormality data if available)





Scrotal circumference (if taken)

Collection method (electroejaculation, etc.)

Conception records:

Dam registration (if exists)

Dam’s sire registration (if exists)

Sire registration

Breeding dates

Herd and location (can be dummy ID, as long as it’s specific and consistent)

Preg check date and result

Days pregnant (if not open)

Days in milk

Which service (or info from all services)


Preg check technician



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