170334 20260410165451.0 doi 10.1002/vms3.70753 sideral 148799 ART-2026-148799 eng González, Noelia Universidad de Zaragoza (orcid)0000-0002-1611-6337 Changes in the Mare Oviduct Across Different Seasons Throughout the Year 2026 At present, oviductal pathologies and their influence on mare fertility have not been clearly determined. Checking changes throughout the year in the oviductal structure may be relevant to understand the influence on the appearance of problems in oviductal functionality and, thus, the impact on fertility, which is the objective of this work. The oviducts of 56 mares were examined. Their anatomy, permeability, oviductal cellularity and the presence of pathologies were assessed to establish the correlations between the time of the year and each of these parameters. We cannot conclude whether there is a correlation between oviductal permeability or the presence of pathologies and season. Also, we did not find a relationship between oviductal permeability and the presence of pathologies; in fact, most of the oviducts analysed were permeable throughout the year (88.13%), and only 5.93% showed partial permeability, while 5.93% were not permeable. Regarding pathologies, 7.62% of the oviducts presented adhesions, with an increased incidence during anoestrus and the spring transitional period, while 23.72% of the oviducts presented paraoviductal cysts and 41.52% presented paraovarian cysts. The incidence of oviductal thickening was observed only during the reproductive season (14.7%). Regarding oviductal cellularity, it´s correlated (0.236) with the ovarian activity observed throughout the year. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/DGA-FEDER/A17-17R-RAySA info:eu-repo/semantics/openAccess by-nc-nd https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Varela, Agatha de Blas, Nacho Universidad de Zaragoza (orcid)0000-0002-1204-4356 Gil, Lydia Universidad de Zaragoza (orcid)0000-0002-0797-1841 1009 773 Universidad de Zaragoza Dpto. Patología Animal Área Sanidad Animal 1009 617 Universidad de Zaragoza Dpto. Patología Animal Área Medicina y Cirugía Animal 12, 2 (2026) Vet. med. sci. Veterinary medicine and science 2053-1095 2632671 http://zaguan.unizar.es/record/170334/files/texto_completo.pdf Versión publicada 2233363 http://zaguan.unizar.es/record/170334/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:170334 articulos driver 2026-04-10-13:46:47 ARTICLE