01550nam a2200301 a 450000100080000000500110000800800410001910000160006024501140007626000410019030000160023150000180024752007540026565000170101965000160103665000170105265000110106965000110108065000290109165000170112065300110113765300100114865300100115865300180116865300220118665300200120865300200122814025942014-10-24       1994    bl uuuu  m   00u1 u    #d1 aMACHADO, R.  aEffects of prostaglandin F2a and norgestomet on estrus synchronization and fertility in postpartum beef cows.  aUrbana: University of Illinoisc1994  a123 p.cil.  aM.Sc. Thesis.  aExperiments were carried out aiming to evaluate stage of estrous cycle on fertility of a synchronized estrus and to determine the minimum effective level of norgestomet delivered from silicone implant capable to suppress estrus for a 16 day period of resynchronization. Postpartum suckled beef cows (n=270) in two locations were randomly in two treatments with (n=134) or without (n=136) a luteolytic dose of PGF2a, dinoprost tromehamine five days prior to the synchoronization of estrus with Syncro-Mate B (SMB). SMB consisted of an injection of 5 mg estradion valerate and 3 mg norgestomet and the insertion of a 6 mg norgestomet implant. The implant was removed 9 days later and the cows were artificially inseminated 48 after implant withdrawal.  ainsemination  anorgestomet  areproduction  aAnimal  aBovino  aInseminação Artificial  aReprodução  aBovine  aCiclo  aEstro  aOestrus cycle  aProstaglandin F2a  aSincronização  aSynchronization