Studies on post-partum anestrous in cattle

Authors

  • Paulo Graça Araújo
  • Gelio Nogueira Pizelli
  • Mauro Ribeiro de Carvalho
  • Osvaldo de Almeida Resende
  • Dirce P.P. de Souza Britto

DOI:

https://doi.org/10.1590/S1678-3921.pab1973.v8.17333

Abstract

Twenty dairy herds, for a total of 4,267 animals of which 2,500 were in lactation, located in the Vale do Paraíba, the states of Rio de Janeiro and São Paulo, were used in these studies. Rectal palpations of 1,065 cows which had not shown signs of heat for more than five months, revealed true anestrous in 750 (17.5%) with the majority of these (70.4%) showing “smooth” ovaries. A total of six experiments were conducted. With the hormone levels used, Estrogen, PMS of HCG did not significantly increase ovulation or pregnancy when compared with the untreated controls. The same was true for ovarian massage compared with the controls.

Downloads

How to Cite

Araújo, P. G., Pizelli, G. N., Carvalho, M. R. de, Resende, O. de A., & Britto, D. P. de S. (2014). Studies on post-partum anestrous in cattle. Pesquisa Agropecuaria Brasileira, 8(6), 13–19. https://doi.org/10.1590/S1678-3921.pab1973.v8.17333

Issue

v.8, n.6, 1973: Série Veterinária

Section

ERRATA