Accelerated Conception Evaluation (ACE) is a sire fertility index developed by Accelerated Genetics by collecting data from dairies across the United States. ACE uses a complex statistical model that accounts for both cow and environmental factors such as parity, number of inseminations, season of breeding, level of milk production,
year of breeding, farm and days in milk; the response variable is sirefertility. The reproduction results included in the analysis are basedonly on actual pregnancy checks, not non-return rates.
In July 2012, ACE was presented at the American Dairy Science Association annual meeting in collaboration with Dr. Victor Cabrera from the University of Wisconsin-Madison. ACE correlation to SCR was 85% for the December 2012 sire proof. ACE scores are assigned according to standard deviations (SD) from the mean conception of the entire dataset, ranked from 1 star to 5 star with 5 stars being the highest.

For easier interpretation, only the star ranking is available.

* Low < -1.5 SD
** Fair -1.4 to -0.5 SD
*** Average -0.4 to +1.0 SD
**** Superior +1.1 to +2.0 SD
***** Excellent > +2.0 SD
To view the flyer that lists the leading ACE sires and explains this program in detail click here.

To see a list of ACE bulls on the bull search page click here.