118741 20240319081024.0 doi 10.1186/s40813-022-00271-0 sideral 129455 ART-2022-129455 eng Vela, A. Universidad de Zaragoza Determination of puberty in gilts: contrast of diagnostic methods 2022 Access copy available to the general public Unrestricted Background Early onset of a gilt´s puberty is needed for adequate economic performance in farms, because it indicates her reproductive performance and longevity. Therefore, an effective diagnosis is needed. Our purpose was to compare different procedures (external characteristics, blood progesterone analysis and ultrasonography diagnosis) to detect puberty in 70 gilts (Topigs TN70; 240 days old) on farm conditions. Postmortem examination was the standard reference. Multiple logistic regression analysis was used to identify which combination of independent variables (predictors) best predicts the status of gilts. Results Puberty (46/70 gilts; 65.71%) was characterized by the presence of follicles larger than 6 mm, corpus albicans, corpus rubrum, and corpus luteum (postmortem examination). Vaginal length, body condition, backfat, carcass weight and progesterone blood concentration were significantly higher in pubertal than prepubertal gilts (P < 0.05). Two types of ultrasonography equipment (DELTA and W3) were compared and performed by the same senior technician (V1). The results obtained by two technicians with different levels of experience (V1 and V2, a junior technician) using W3 were also compared. Ultrasonography provided better results than other diagnostic techniques, although the effectiveness of the ultrasonography changed with technological improvements and with increased expertise of technicians. The most accurate results were found by V1/DELTA (Nagelkerke´s R2 = 0.846; Sensitivity = 0.956; Specificity = 0.958; Positive predictive value = 0.978; Negative predictive value = 0.920; Area under ROC curve = 0.957). Results using the W3 equipment could be improved when used in conjunction with vaginal length (V1; Nagelkerke´s R2 = 0.834; Sensitivity = 0.933; Specificity = 0.958; Positive predictive value = 0.977; Negative predictive value = 0.885; Area under ROC curve = 0.972) or progesterone concentration (V2; Nagelkerke´s R2 = 0.780; Sensitivity = 0.955; Specificity = 0.826; Positive predictive value = 0.915; Negative predictive value = 0.905; Area under ROC curve = 0.970). Conclusions Ultrasonography provided better results than other diagnostic techniques. The effectiveness of the ultrasonography changes with technological improvements and with increased expertise of technicians. Results using the W3 equipment could be improved when used along with vaginal length (V1) or progesterone concentration (V2). Accuracy parameters are a guide to choose puberty diagnosis, but the farms must also evaluate effect on gilts, ease and cost of administration. info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 3.4 2022 VETERINARY SCIENCES 10 / 144 = 0.069 2022 Q1 T1 0.763 2022 Animal Science and Zoology 2022 Q1 Small Animals 2022 Q1 Food Animals 2022 Q1 5.2 2022 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Suárez Usbeck, A. Lafoz, L. Mitjana, O. Universidad de Zaragoza (orcid)0000-0001-9907-2941 Tejedor, M. T. Universidad de Zaragoza (orcid)0000-0001-5026-5144 Martín, S. López, M. Falceto, M.V. Universidad de Zaragoza (orcid)0000-0001-6964-7011 1001 420 Universidad de Zaragoza Dpto. Anatom.,Embri.Genét.Ani. Área Genética 2008 700 Universidad de Zaragoza Dpto. Produc.Animal Cienc.Ali. Área Producción Animal 1009 617 Universidad de Zaragoza Dpto. Patología Animal Área Medicina y Cirugía Animal 8 (2022), 28 [14 pp.] Porcine Health Management 2055-5660 1997611 http://zaguan.unizar.es/record/118741/files/texto_completo.pdf Versión publicada 2603414 http://zaguan.unizar.es/record/118741/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:118741 articulos driver 2024-03-18-16:33:26 ARTICLE