02353nam a2200421 a 450000100080000000500110000800800410001910000270006024501410008726000690022850002580029752009470055565000090150265000140151165000170152565000170154265000100155965000190156965000170158865000140160565000100161965000150162965000170164465000240166165000200168565300140170565300090171965300190172865300160174765300200176370000210178370000220180470000220182670000200184870000200186870000230188870000200191120742862019-09-23       2015    bl uuuu     u00u1 u    #d1 aSOUZA-FABJAN, J. M. G.  aGnRH potential to synchronize follicular emergence and ovulation prior to superovulatory day 0 protocol in sheep.h[electronic resource]  aAnimal Reproduction, v. 12, n. 3, p. 712, Jul./Sept. 2015.c2015  aProceedings of the 29th Annual Meeting of the Brazilian Embryo Technology Society (SBTE); Gramado, RS, Brazil, August 20th to 23rd, 2015, and 31st Meeting of the European Embryo Transfer Association (AETE); Ghent, Belgium, September 11th and 12th, 2015.  aThe role of GnRH to synchronize ovulation and follicular emergence previous to superovulatory protocol, started on the first day of the estrous cycle (Day 0), was assessed in Santa Inês ewes. For estrus synchronization, 60 mg medroxyprogesterone acetate sponges were used for 6 d plus 37.5 ?g d-cloprostenol and 300 IU eCG at fifth day. After sponge removal, ewes were assigned to three treatments: GControl ? saline at 12 h (n = 10); G24h ? GnRH at 24 h (n = 10); or G36h ? GnRH at 36 h (n = 9). In conclusion, considering the beneficial effects of G36h in synchronizing ovulation and to promote the absence of dominant follicles in the first days of estrous cycle. According to data obtained, the best time to start the superovulatory treatment, known as "Day 0", could be 80 h after sponge removal (56 h for the occurrence of ovulation plus 24 h to reset dominant follicles), in the induction of synchronized estrus, for Santa Inês ewes.  aEwes  aOvulation  aProgesterone  aReproduction  aSheep  aSuperovulation  aCiclo estral  aEstradiol  aOvino  aOvulação  aProgesterona  aReprodução animal  aSuperovulação  aLecirelin  aMOET  aOestrous cycle  aSanta Inês  aSynchronization1 aBALARO, M. F. A.1 aBARBOSA, T. G. B.1 aFONSECA, J. F. da1 aFIGUEIRA, L. M.1 aTEIXEIRA, T. A.1 aCARVALHEIRA, L. R.1 aBRANDÃO, F. Z.