Right horn-left horn pregnancy diagnosis as a means of evaluating A.I. Technique

Abstract

In a study conducted in Washington state involving 2,800 first-service inseminations of four large Holstein dairies, it was reported that the two largest reasons for nonconception to first-service were 1) variability between inseminators and 2) variability between bulls.

Within a particular dairy, variation between and among bulls can be evaluated using conception data provided by A.I. studs with the herds’ DHIA records. So, we are left with a need to evaluate the inseminator/ technician on an ongoing- basis. Every inseminator on the farm should be evaluated whether it be a herdsman, owner, or profesisonal inseminator.