118959 20240319081010.0 doi 10.3390/vetsci9070370 sideral 130324 ART-2022-130324 eng Palacios, C. Efficiency of Artificial Insemination at Natural Estrus in Organic Churra Ewes 2022 Access copy available to the general public Unrestricted Hormonal treatments used in the artificial insemination (AI) of sheep can cause several physiological problems that can affect negatively fertility and animal health; however, AI protocols based on the detection of natural estrus offer a more sustainable option and can achieve high fertility. In this study, an AI protocol at natural estrus in organic Churra sheep was performed. In the first phase (AI protocol development), 125 ewes were exocervically inseminated, and their fertility was assessed based on the following factors: number of AI, physiological state, body condition, estrus detection–AI interval, and vaginal fluids in cervix. That protocol was repeated for six consecutive years. In all individuals, fertilities based on the timing of insemination after estrus detection were very high. Lactating ewes produced better results than did dry ewes, which was probably because of the better feeding of the former. In addition, double insemination increased the fertility of ewes whose estrus was detected within 16 h of onset. Body condition and amount of vaginal fluid were correlated with fertility. Exocervical inseminations at natural estrus can produce acceptable fertility and prolificity in Churra ewes. info:eu-repo/grantAgreement/ES/MICINN/PTQ-09-02-01982 info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 2.4 2022 VETERINARY SCIENCES 29 / 144 = 0.201 2022 Q1 T1 0.524 2022 Veterinary (miscellaneous) 2022 Q1 2.3 2022 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Abecia, J. A. Universidad de Zaragoza (orcid)0000-0003-2827-3054 Plaza, J. Hidalgo, C. Fuente, L. F. de la 2008 700 Universidad de Zaragoza Dpto. Produc.Animal Cienc.Ali. Área Producción Animal 9, 7 (2022), 370 [11 pp.] Veterinary Sciences 2306-7381 845363 http://zaguan.unizar.es/record/118959/files/texto_completo.pdf Versión publicada 2596834 http://zaguan.unizar.es/record/118959/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:118959 articulos driver 2024-03-18-15:05:41 ARTICLE