The use of lower doses of the prostaglandin analogue, cloprostenol, for oestrus synchronization in heifers

Abstract

In an attempt to reduce costs for cattle oestrus synchronization, the use of lower doses (50 and 25% of the conventional dose) of the prostaglandin F 2α analogue, cloprostenol, given by either intramuscular (IM) or intravulvo-submucosal (IVSM) injection, was investigated. There were no differences in the luteolytic response, as measured by either the fall in plasma progesterone or onset of oestrus, between lower cloprostenol doses administered by either method and 500 μg given by IM injection.