02047naa a2200361 a 450000100080000000500110000800800410001902400550006010000170011524501490013226000090028152009960029065000280128665000340131465000110134865000140135965000140137365000170138765000100140465000170141465000150143165000180144665000140146465000290147865000100150765000170151765000170153465000270155165300100157865300250158865300190161377300530163215215002023-11-09       1977    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1016/S0093-691X(77)80004-62DOI1 aSMITH, J. F.  aEstrus, ovulation and conception following timed insemination in Romney ewes treated with progesterone and gonadotropins.h[electronic resource]  c1977  aAbstract: Estrus, ovulation, and conception following timed insemination were studied in 500 Romney ewes treated with progestagen and gonadotropins. The ewes were treated with intravaginal sponges containing 40 mg "Crondone" for 14 days. At the time of sponge removal all ewes received an im injection of 500 IU pregnant mare's serum gonadotropin. 24 hours later 1/2 of the ewes received an im injection of human chorionic gonadotropin. The ewes exhibited estrus sooner after sponge removal in April than in January (34.9 vs. 38.9 hours, p less than .001). The interval from sponge removal to ovulation was also shorter in April than in January (=6.3 vs. 62.1 hours, p less than .01). There were no marked differences between treatments or season on the mean interval from estrus to ovulation. The types of gonadotropin treatment had no effect on the estrus-ovulation time relationships, and there were no marked effects of season, hormone treatment, or time of insemination on lambing rate.  aArtificial insemination  aEquine chorionic gonadotropin  aEstrus  aOvulation  aPregnancy  aReproduction  aSheep  aCiclo Estral  aFisiologia  aGonadotrofina  aHormônio  aInseminação Artificial  aOvino  aProgesterona  aReprodução  aSincronização do Cio  aEstro  aFlurogestone Acetate  aPregnenediones  tTheriogenologygv. 7, n. 2, p. 63-72, Feb. 1977.