Effects of two different protocols: injection of progesterone vs. injection of GnRH+PGF2a on the onset of estrus in dairy cows with postpartum anestrous
1. Effects of two different protocols: injection of progesterone vs. injection of GnRH+PGF2a on the onset of estrus in dairy cows with postpartum anestrous

N. Mozaffari; H. Hamali; R. Jafari

Volume 2, Issue 1 , Winter 2014, , Pages 146-150

Abstract
  Postpartum anestrous is one of the most important problems in the dairy industry in the world and especially in Iran. The objective of present study was to compare the efficacy of two ...  Read More
Effect of GnRH injection at day 6 and 12 after insemination on fertility of Holstein dairy cows during the warm season
2. Effect of GnRH injection at day 6 and 12 after insemination on fertility of Holstein dairy cows during the warm season

E. Dirandeh; A. Rezaei Roodbari; B. Shohreh

Volume 2, Issue 1 , Winter 2014, , Pages 125-131

Abstract
  The objective of this study was to determine the effects of two different time of GnRH injection after artificial insemination (A.I) (d 6 and d 12) on reproductive performances of Holstein ...  Read More