Avaliação biológica e econômica do uso de flunixin meglumine em vacas e novilhas de corte inseminadas em tempo fixo

Abstract

This study aimed to evaluate the effectiveness and the economical advantage of using flunixin meglumine (FM) to block uterine secretion of prostaglandin in order to reduce embryonic losses in beef cattle females. Postpartum cows (E1) and heifers (E2) were submitted to estrus synchronization and inseminated at fixed time. Fourteen days after the insemination the animals were assigned to the FM treatment group (FMG, including 59 cows and 23 heifers) and to the control group (CG, including 56 cows and 20 heifers). Pregnancy rates (42.4% for FMG and 42.8% for CG in E1) and (39.1% for FMG and 25.0% for CG in E2) did not differ between groups. Estimates of net income were 21.62, 9.24, 14.36 and 12.06% for the CG e FMG protocols in cows and in heifers, respectively. The use of FM at 14 days after AI did not affect pregnancy rates of postpartum beef cows and heifers. © 2008 Sociedade Brasileira de Zootecnia.