Last season the reproductive outcomes were examined from 8,500 non-cycling cows treated from 64 farms in our practice.
This is the biggest single study conducted in NZ on CIDR outcomes at a commercial level. From this study we were able to identify the optimal number of days-in-milk when treated, best time to treat relative to PSM and the optimal age of treatment. Overall the average first service CR was 47% which is extremely good for cows being mated on the first oestrus for the season. Cows under five years had the best response. Optimal first service conception rate occurred from cows >45 Days In Milk (DIM) and optimal MT rates in cows >40 DIM.