Effects of GnRH, a progesterone ‐releasing device, and energy balance on an oestrus synchronisation program in anoestrous dairy cows

ConclusionIn cows without a CL present on day 0 of an oestrus synchronisation program, removal of the day 0 GnRH treatment led to reduced CL development; however, no effect of adding progesterone was found. In contrast, in cows with a CL present on day 0 inclusion of a progesterone device led to a higher CL volume, but removal of the first GnRH injection had no effect. Response to the treatment was affected by plasma concentrations of insulin, IGF‐I and NEFA.
Source: Australian Veterinary Journal - Category: Veterinary Research Authors: Tags: PRODUCTION ANIMALS Source Type: research