Abstract
Survey on the course of puerperium and on fertility after implementation of the iVET® birth monitoring system in heifers
Highlights
In the iVET® group, significantly fewer animals calved without assistance and there were significantly more calvings with extreme difficulty especially in the 24h+group
The evaluation of calving ease and the examinations during puerperium showed that a retention time of transmitters in heifers of more than 24 hours cannot be recommended
This limitation makes the use of the birth monitoring system problematic; under real-life conditions it is hardly possible to predict the beginning of birth with sufficient accuracy with an acceptable amount of effort
Summary
In the iVET® group, significantly fewer animals calved without assistance and there were significantly more calvings with extreme difficulty especially in the 24h+group. Significantly more animals had active ovaries when they were first examined on Day 10 p.p. than in the iVET® group. The number of animals which had to be culled before Day 200 p.p. was significantly higher in the iVET® group than in the control group. The evaluation of calving ease and the examinations during puerperium showed that a retention time of transmitters in heifers of more than 24 hours cannot be recommended. This limitation makes the use of the birth monitoring system problematic; under real-life conditions it is hardly possible to predict the beginning of birth with sufficient accuracy with an acceptable amount of effort.
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