130166 20251113150203.0 doi 10.1111/rda.14326 sideral 133152 ART-2023-133152 eng Falceto, M. V. Universidad de Zaragoza (orcid)0000-0001-6964-7011 GnRH agonists: updating fixed-time artificial insemination protocols in sows 2023 Access copy available to the general public Unrestricted Protocols for fixed-time artificial insemination (FTAI) in swine reproduction can help increase genetic improvement and production efficiency. Different gonadotropin-releasing hormone (GnRH) agonists have been developed to gain better control of follicular development, timing, and ovulation quality; therefore, they have been extensively used in FTAI protocols. This literature review resumes the most important characteristics of the physiology of follicular development and ovulation in sows, followed by a discussion about the hormonal alternatives available to induce ovulation (human chorionic gonadotropin, hCG; porcine luteinizing hormone, LH and GnRH agonists). Also, ovulation induction failures with GnRH agonists are described. Finally, current FTAI protocols with GnRH agonists are resumed and discussed. FTAI with GnRH agonists has proven to be an efficient, successful reproductive protocol that can be implemented in pig farms due to better knowledge of an endocrine system that regulates follicular development and ovulation and increased availability of several GnRH agonists that allow more efficient reproductive swine programs. info:eu-repo/semantics/openAccess by-nc-nd https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es 1.6 2023 AGRICULTURE, DAIRY & ANIMAL SCIENCE 34 / 80 = 0.425 2023 Q2 T2 VETERINARY SCIENCES 62 / 167 = 0.371 2023 Q2 T2 REPRODUCTIVE BIOLOGY 32 / 39 = 0.821 2023 Q4 T3 0.457 2023 Animal Science and Zoology 2023 Q2 Endocrinology 2023 Q3 Biotechnology 2023 Q3 3.0 2023 info:eu-repo/semantics/review info:eu-repo/semantics/publishedVersion Suárez-Usbeck, A. Tejedor, M. T. Universidad de Zaragoza (orcid)0000-0001-5026-5144 Ausejo, R. Universidad de Zaragoza (orcid)0000-0003-0770-9250 Garrido, A. M. Universidad de Zaragoza Mitjana, O. Universidad de Zaragoza (orcid)0000-0001-9907-2941 1001 420 Universidad de Zaragoza Dpto. Anatom.,Embri.Genét.Ani. Área Genética 1009 617 Universidad de Zaragoza Dpto. Patología Animal Área Medicina y Cirugía Animal 58, 5 (2023), 571-582 Reprod. domest. anim. Reproduction in Domestic Animals 0936-6768 934471 http://zaguan.unizar.es/record/130166/files/texto_completo.pdf Versión publicada info:eu-repo/semantics/openAccess 2349751 http://zaguan.unizar.es/record/130166/files/texto_completo.jpg?subformat=icon icon Versión publicada info:eu-repo/semantics/openAccess oai:zaguan.unizar.es:130166 articulos driver 2025-11-13-15:00:42 ARTICLE