Free plasma estrogens in the ewe during the estrous cycle |
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| Authors: | R L Norman B E Eleftheriou H G Spies P Hoppe |
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| Affiliation: | 1. Institute of Veterinary Anatomy, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland;2. Department of Basic Sciences, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran;3. Clinic for Ruminants, LMU Munich, Munich, Germany;4. Clinic for Animal Reproduction Medicine, University of Zurich, Zurich, Switzerland;5. Faculty of Veterinary Médicine, University of Liège, Liège, Belgium;1. Ecole Nationale Vétérinaire d’Alfort, UMR 1198 Biologie du Développement et Reproduction, Université Paris Est, 7 av du général de Gaulle, F-94704 Maisons-Alfort Cedex, France;2. UMR BDR, INRA, Université Paris Saclay, 78350 Jouy en Josas, France;3. INRA, UE 1298 Unité Commune d’Expérimentation Animale, Domaine de Bressonvilliers, F-91630 Leudeville, France;1. Department of Theriogenology, Faculty of Veterinary Science, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan;2. Department of Clinical Sciences, Faculty of Veterinary Science, Bahauddin Zakariya University, Multan 60800, Pakistan;3. Department of Animal Sciences, University of Florida, Gainesville 32611, USA;4. Department of Veterinary Medicine, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan;5. Department of Livestock Production, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan;6. Laboratory of Animal Improvement and Reproduction, Institute of Animal Science, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China;1. Faculdade de Veterinária, Universidade Federal Fluminense, Av. Vital Brasil Filho, 64, CEP 24230-340 Niterói, RJ, Brazil;2. Facultad de Veterinaria, Universidad de la República, Lasplaces 1620, Montevideo 11600, Uruguay;3. Embrapa Caprinos e Ovinos, Núcleo Regional Sudeste, Rodovia MG 133, Km 42, CEP 36155-000 Coronel Pacheco, MG, Brazil |
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| Abstract: | Free plasma estrogens were measured during the estrous cycle of the ewe. Estrogens measured were estrone (1, 3, 5(10)-estratriene-3-ol-17-one), estradiol-17β (1, 3, 5(10)-estratriene-3, 17β-diol), and 16-ketoestradiol-17β (1, 3, 5(10)-estratriene-3, 17β-diol-16-one), which were identified in plasma from pregnant ewes. The total estrogen level was found to increase from a low value of 0.14 μg/100 ml plasma at two days following ovulation to a high value of 2.53 μg/100 ml plasma just prior to ovulation. Ketoestradiol was found to be the estrogen with the highest concentration of all estrogens measured during the estrous cycle. |
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