This reproduction report provides an overview of the pregnancy rate per herd. Insights into the reproduction success of your cows will provide you with the opportunity to plan and act accordingly, as good reproduction management supports good lifetime milk production.
When opening the report, you can select the desired lactation number, herd and a specific date or day range. The calculations in the report are explained below in more detail.
Date
The date in the column of the report represents the 21 day reproduction cycle and the calculation is based on the input 6 to 9 weeks before the presented date, meaning:
- End date of 21 days is – 6 weeks
- Start date of 21 days is -9 weeks + 1 day
For example, today is 01/25/2023. The newest date in the column is 01/19/2023, these numbers are based on the input of the data between 11/18/2022 and 12/08/2022. The next available date will be 02/09/2023. These dates are the same for every farm.
No. Eligible
To determine if a cow is eligible for becoming pregnant, the following is included in the calculation:
- Lactation days ≥ voluntary waiting period
- Lactation days ≤ 200 lactation days
- Reproduction status:
- Open
- Never inseminated (youngstock)
- Open cyclic
- Inseminated and not pregnant from this insemination
- Cow is inseminated within the period
AND
At end of the period, the reproduction status is not keep open
Excluded:
- Cows between insemination and positive pregnancy during the specific period
- Cows which are not eligible or not inseminated during the specific period
- Sires
No. Inseminated
Calculation contains all lactating cows with an insemination. Cows inseminated twice in the period are counted as 1.
No. Pregnant
Calculation contains all lactating cows with an insemination that was confirmed pregnant.
% Inseminated & % Pregnant
The infographic below shows an example of how the insemination-, conception-, and the pregnancy rate is calculated and where the numbers come from. If the pregnancy rate is below 25%, there are several solutions you can try. Keep in mind that the lower the number of cows on the farm, the more variable the pregnancy rate can be.
Check 90% certainty: If less than 90% of the inseminated animals have a result, then pregnancy rate is not shown and this field is empty because the number is not reliable. Possible results are; pregnant (either through auto preg, or with a confirmed preg check), not pregnant (new heat registered, or a negative preg check), or culled (counted as result, but the animal is not counted as pregnant or not pregnant).
Automatic heat and pregnancy detection
If the automatic heat and pregnancy detection are turned on for the farm, they are also counted as a result for an insemination. If an automatic heat is detected, the result for the insemination is “not pregnant.” If a cow is auto pregnant, the result is “pregnant.” The goal of the automatic pregnancy detection is to mark cows as “auto pregnant.” The advantage of this functionality is that fewer cows need to be checked for pregnancy by the vet.