Summary of bull use and fertility

This command allows comparison of the fertility of bulls used in the herd over a specified time period. This includes Q-sum analysis. The performance of inseminators, breed of bull and other parameters can also be studied. 

Services between: All services recorded between the dates specified will be included in the analysis.

- allows the analysis to be limited to services recorded in specific parity (lactation) groups. Checking Parity 0  only will limit the analysis to inseminations of heifers. Checking all four boxes ensures all services are included.

- The parameter class that should be analysed. Click the drop-down arrow to display the other options which include bull breed, inseminator, month of calving etc.

Click the to display the analysis grid.

Class: A list of all items in the specified class drop down box. In the example above, Bulls is the specified class so the list is of all bulls used during the analysis period. If Inseminator was specified in the dropdown box then the list would be of all inseminators.
No.Services: The total services recorded for the class. So in the example above the bull MAGROSVENOR was used 49 times in the analysis period
Non-return within 35 days: The % of services that were not followed withi 35 days by a further service.
PD positive: The number of services that resulted in a positive pregnancy diagnosis.
Calved: The number of services that resulted in a calving.

Q-sum analysis can be performed on any individual item in the grid or on the overall total of inseminations. To display a q-sum of the overall total inseminations, click the value in the lower grid with the right mouse button and select q-sum (see also Q-Sum analysis).

To display the Q-sum for the performance of an individual bull, select Bull in the class dropdown box then right mouse button on the total services of the bull required.