02512naa a2200325 a 450000100080000000500110000800800410001902400430006010000180010324502050012126000090032652014600033565000240179565000280181965000270184765000100187465000140188465000200189865300070191865300220192570000220194770000190196970000200198870000180200870000200202670000230204670000270206970000220209677300680211821163452025-01-10       2019    bl uuuu     u00u1 u    #d7 a10.1016/j.anireprosci.2019.1061722DOI1 aBONATO, G. C.  aEffects of d-cloprostenol administrations with 7.5 and 11.5-day intervals between administrations on pregnancy rates after artificial insemination in estrous cyclic dairy goats.h[electronic resource]  c2019  aAbstract: This study was conducted to evaluate effects of two administrations of d-cloprostenol at different intervals to synchronize the time of estrus and ovulation among estrous cyclic goats. In Experiment 1, 32 does were treated with 30??g?d-cloprostenol at 7.5 (T7.5, n = 16) or 11.5-day (T11.5, n = 16) intervals. In Experiment 2, the same treatments were administered and there was AI of the does (T7.5, n = 40 and T11.5, n = 38). In Experiment 1, ultrasonic assessments of ovaries were conducted at the time of the second administration of d-cloprostenol, every 12?h until detection of ovulation, and 7 days after estrous onset to detect the corpora lutea, as well as for pregnancy diagnosis 40 days after AI. In Experiment 1, the estrous response (90.6%, 29/32) was similar (P?&gt?0.05) in both groups. Diameter of the largest follicle at the time of administration of the second dose was larger (P = 0.01) in the T7.5 than T11.5 group (7.0 compared with 5.7?mm), while the values for ovarian variables were similar (P?&gt?0.05). In Experiment 2, the greatest (P?&lt?0.001) synchrony in timing of initiation of estrus in does (T7.5 = 83.3% and T11.5 = 50.0%) occurred after the second day (36-48?h). The pregnancy rate tended (P = 0.0836) to be greater for does in the T7.5 (71.4%, 40/56) than T11.5 (55.6%, 30/54) group. With use of both protocols, there were acceptable estrous synchronization and pregnancy rates in estrous cyclic dairy goats.  aAnimal reproduction  aArtificial insemination  aEstrus synchronization  aGoats  aOvulation  aUltrasonography  aAI  aEstrous synchrony1 aMAIA, A. L. R. S.1 aCÔRTES, L. R.1 aOLIVEIRA, T. A.1 aARRAIS, A. M.1 aFIGUEIRA, L. M.1 aOLIVEIRA, M. E. F.1 aSOUZA-FABJAN, J. M. G.1 aFONSECA, J. F. da  tAnimal Reproduction Sciencegv. 209, article 106172, Oct. 2019.