The Efficacy of Norgestomet Implants on Performance and Preventing Pregnancy in Grazing Postpubertal Beef Heifers

An abstract of a study by Hawley et al assessing the efficacy of long-acting, erodible implants containing Norgestomet (11β-methyl-17α-acetoxy-19-norprogesterone) on performance and preventing pregnancy in grazing postpubertal beef heifers is presented. Pregnancy rates of heifers that received 100 or 150 mg Norgestomet were not different (P = 0.46). These data suggest that implants containing 100 and 150 mg Norgestomet increased rate of gain and prevented pregnancy in grazing postpubertal beef heifers.