Hormonal changes and follicular activity after treatment with intravaginal progesterone-releasing devices in llamas
| Autor: | MV Cavilla, F Aguilera, Carolina Paula Bianchi, M Hermida, Marcelo Alfredo Aba |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
medicine.medical_specialty
03 medical and health sciences Follicle 0302 clinical medicine Endocrinology FOLLICULAR ACTIVITY Ovarian Follicle Internal medicine Follicular phase Animals Medicine Ovarian follicle Progesterone 030219 obstetrics & reproductive medicine Estradiol Adult female business.industry INTRAVAGINAL DEVICES Ciencias Veterinarias 0402 animal and dairy science Definite time 04 agricultural and veterinary sciences PROGESTERONE 040201 dairy & animal science medicine.anatomical_structure LLAMAS CIENCIAS AGRÍCOLAS Female Animal Science and Zoology Plasma progesterone business Camelids New World After treatment Biotechnology Hormone |
| Popis: | Plasma progesterone (P4) concentrations and follicular activity after administration of different P4 doses were evaluated in 33 adult female llamas treated with intravaginal devices. In Study 1, a group of llamas (n = 10) was treated with an intravaginal device (IVD) containing 160 (n = 5) or 780 mg of P4 (n = 5). Based on the results from the first study, in Study 2, females with follicles at different stages of development were treated with the IVD containing 780 mg of P4 (n = 21) or remain untreated (control; n = 12) to evaluate the effect of P4 on follicular activity. In Study 1, the IVD containing 160 mg of P4 induced follicular turnover in 60% of females while the remaining 40% of llamas developed persistent follicles. Thus, this device controlled follicular activity in llamas, although it promotes the persistence of follicles present at start of treatment. Conversely, in both studies, the IVD containing 780 mg of P4 suppressed follicular development and hasten the emergence of a new follicular wave in all females regardless of the follicular phase at insertion. Additionally, in Study 2, this device effectively concentrated the appearance of follicles with ovulatory diameter at a definite time after treatment in comparison with control animals. In conclusion, treatment with an IVD containing 780 mg of P4 would be considered for the control of follicular activity in llamas as it ensures the presence of a young follicle with ovulatory diameter by day 6 after the end of treatment in all females. Fil: Cavilla, María Verónica. Universidad Nacional del Centro de la Provincia de Buenos Aires.. Facultad de Ciencias Veterinarias. Departamento de Fisiopatologia. Laboratorio de Endocrinologia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Bianchi, Carolina Paula. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Centro de Investigación Veterinaria de Tandil. Universidad Nacional del Centro de la Provincia de Buenos Aires. Centro de Investigación Veterinaria de Tandil. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Centro de Investigación Veterinaria de Tandil; Argentina Fil: Aguilera, F.. Universidad Nacional del Centro de la Provincia de Buenos Aires.. Facultad de Ciencias Veterinarias. Departamento de Fisiopatologia. Laboratorio de Endocrinologia; Argentina Fil: Hermida, M.. Universidad Nacional del Centro de la Provincia de Buenos Aires.. Facultad de Ciencias Veterinarias. Departamento de Fisiopatologia. Laboratorio de Endocrinologia; Argentina Fil: Aba, M. A.. Universidad Nacional del Centro de la Provincia de Buenos Aires.. Facultad de Ciencias Veterinarias. Departamento de Fisiopatologia. Laboratorio de Endocrinologia; Argentina |
| Databáze: | OpenAIRE |
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