Astiz Blanco, SusanaRíos Abellán, AlejandroGarcía Roselló, EmparGonzález de Bulnes López, AntonioMartínez Ros, PaulaUCH. Departamento de Producción y Sanidad Animal, Salud Pública Veterinaria y Ciencia y Tecnología de los AlimentosProducción Científica UCH 2018UCH. Departamento de Medicina y Cirugía Animal2020-12-122020-12-122018-10-01Martinez-Ros, P., Astiz, S., Garcia-Rosello, E., Rios-Abellan, A. & Gonzalez-Bulnes, A. (2018). Effects of short-term intravaginal progestagens on the onset and features of estrus, preovulatory LH surge and ovulation in sheep. Animal Reproduction Science, vol. 197 (oct.), pp. 317-323. DOI: https://doi.org/10.1016/j.anireprosci.2018.08.0460378-4320.http://hdl.handle.net/10637/11752Este artículo se encuentra disponible en la página web de la revista en la siguiente URL: https://www.sciencedirect.com/science/article/abs/pii/S0378432018306626?via%3DihubThis is the pre-peer reviewed version of the following article: Martinez-Ros, P., Astiz, S., Garcia-Rosello, E., Rios-Abellan, A. & Gonzalez-Bulnes, A. (2018). Effects of short-term intravaginal progestagens on the onset and features of estrus, preovulatory LH surge and ovulation in sheep. Animal Reproduction Science, vol. 197 (oct.), pp. 317-323, which has been published in final form at https://doi.org/10.1016/j.anireprosci.2018.08.046.Este es el pre-print del siguiente artículo: Martinez-Ros, P., Astiz, S., Garcia-Rosello, E., Rios-Abellan, A. & Gonzalez-Bulnes, A. (2018). Effects of short-term intravaginal progestagens on the onset and features of estrus, preovulatory LH surge and ovulation in sheep. Animal Reproduction Science, vol. 197 (oct.), pp. 317-323, que se ha publicado de forma definitiva en https://doi.org/10.1016/j.anireprosci.2018.08.046.In the present study, there was a comparison among classical long-term progestagen (fluorogestone acetate) protocols for synchronization of estrus and ovulation (14 days; group FGA14, n = 9 ewes) and short-term protocols based on 7 days of progestagen treatment plus a dose of prostaglandin F at either insertion (PG-FGA7, n = 11) or removal (FGA7-PG, n = 12). There were no significant differences in the ovulation rate and progesterone secretion among treatments. The FGA7-PG group, however, had a similar percentage of ewes expressing estrous behavior than the group FGA14 (90.9 and 100%, respectively, with a trend for a lesser percentage in the PG-FGA7 group, 63.6%) and about 90% of the ewes in the FGA7-PG group had the preovulatory surge release of LH 8 h after the onset of estrous behavior. These features may be related to a greater number of preovulatory follicles during growing phases (P < 0.05) and a greater plasma estradiol concentration (P < 0.05) in this group than in the classical 14-day group, which suggest these are more functional preovulatory follicles. In conclusion, therefore, the use of the FGA7-PG treatment may favor efficiency of progestagen-based protocols for reproductive management.application/pdfesopen accessVeterinary pharmacology.Progesterona - Uso terapéutico.Ovejas - Reproducción asistida.Farmacología veterinaria.Prostaglandinas - Uso terapéutico.Prostaglandins - Therapeutic use.Sheep - Reproductive technology.Progesterone - Therapeutic use.Artículohttps://doi.org/10.1016/j.anireprosci.2018.08.046https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es