| |
|
|
 | Acceso al texto completo restringido a Biblioteca INIA La Estanzuela. Por información adicional contacte bib_le@inia.org.uy. |
|
Registro completo
|
|
Biblioteca (s) : |
INIA La Estanzuela. |
|
Fecha : |
21/02/2014 |
|
Actualizado : |
08/10/2019 |
|
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
|
Autor : |
VIÑOLES, C.; FORSBERG, M.; BANCHERO, G.; RUBIANES, E. |
|
Afiliación : |
CAROLINA VIÑOLES GIL, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; Center for Reproductive Biology, Dept. of Clinical Chemistry, Swedish University of Agricultural Sciences, Uppsala, Sweden.; GEORGGET ELIZABETH BANCHERO HUNZIKER, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; EDGARDO RUBIANES, Dept. of Physiology, Faculty of Veterinary Medicine, Lasplaces 1550, Montevideo, Uruguay. |
|
Título : |
Effect of long-term and short-term progestagen treatment on follicular development and pregnancy rate in cyclic ewes. |
|
Fecha de publicación : |
2001 |
|
Fuente / Imprenta : |
Theriogenology, 1 March 2001, Volume 55, Issue 4, Pages 993-1004 |
|
DOI : |
10.1016/S0093-691X(01)00460-5 |
|
Idioma : |
Inglés |
|
Notas : |
Article history:Received for publication: September 28, 1999/ Accepted: May 1, 2000. |
|
Contenido : |
Abstract.
The aim of this study was to evaluate the effect of the length of a progestagen treatment (12 d vs. 6 d) on follicular dynamics, estrus synchronization and pregnancy rate using medroxyprogesterone acetate (MAP) with or without an eCG dose at the end of MAP treatment. One hundred sixty Polwarth ewes were divided into four equal groups: long-term treated (LT, n=40); short-term treated (ST, n=40); long-term treated plus eCG (LTeCG, n=40); and short-term treated plus eCG (STeCG, n=40). Five ewes of each group were separated to undergo daily transrectal ultrasonography, and blood samples were taken for hormone determination. Until 96 h after sponge withdrawal the number of ewes in estrus was higher in both long-term-treated groups than in both short-term-treated groups but at the end of the observational period (144 h) no significant differences were found among groups. The pregnancy rate was higher in the ST group (87%) than in the other groups (LT, 63%; LTeCG, 67%; and STeCG, 58%; P< or =0.03). The ovulatory follicle emerged before sponge withdrawal in long-term-treated ewes (-3.8+/-0.4 d and -2.2+/-0.8 d for LT and LTeCG, respectively), whereas in short-term-treated ewes it emerges around sponge removal (0.4+/-1.1 d and 0.5+/-0.5 d for ST and STeCG, respectively; P< or =0.01). The ovulatory follicle in the LT group had a longer lifespan and attained a larger (P< or =0.05) maximum diameter than in the ST group. We conclude: a) that the lower pregnancy rate observed after long-term progestagen treatment was related to a slower follicular turnover that promoted the ovulation of persistent dominant follicles; (b) that short-term treatment resulted in a higher pregnancy rate probably due to the ovulation of newly recruited growing follicles; and (c) treatment with eCG had no advantage in association with long-term treatment and had a deleterious effect in combination with short-term treatment with MAP MenosAbstract.
The aim of this study was to evaluate the effect of the length of a progestagen treatment (12 d vs. 6 d) on follicular dynamics, estrus synchronization and pregnancy rate using medroxyprogesterone acetate (MAP) with or without an eCG dose at the end of MAP treatment. One hundred sixty Polwarth ewes were divided into four equal groups: long-term treated (LT, n=40); short-term treated (ST, n=40); long-term treated plus eCG (LTeCG, n=40); and short-term treated plus eCG (STeCG, n=40). Five ewes of each group were separated to undergo daily transrectal ultrasonography, and blood samples were taken for hormone determination. Until 96 h after sponge withdrawal the number of ewes in estrus was higher in both long-term-treated groups than in both short-term-treated groups but at the end of the observational period (144 h) no significant differences were found among groups. The pregnancy rate was higher in the ST group (87%) than in the other groups (LT, 63%; LTeCG, 67%; and STeCG, 58%; P< or =0.03). The ovulatory follicle emerged before sponge withdrawal in long-term-treated ewes (-3.8+/-0.4 d and -2.2+/-0.8 d for LT and LTeCG, respectively), whereas in short-term-treated ewes it emerges around sponge removal (0.4+/-1.1 d and 0.5+/-0.5 d for ST and STeCG, respectively; P< or =0.01). The ovulatory follicle in the LT group had a longer lifespan and attained a larger (P< or =0.05) maximum diameter than in the ST group. We conclude: a) that the lower pregnancy rate observed af... Presentar Todo |
|
Palabras claves : |
EWES; FERTILITY; OVARIAN DYNAMICS; PREÑEZ EN OVEJA; PROGESTAGEN; ULTRASONOGRAPHY. |
|
Asunto categoría : |
L53 Fisiología Animal - Reproducción |
|
Marc : |
LEADER 02753naa a2200253 a 4500
001 1049494
005 2019-10-08
008 2001 bl uuuu u00u1 u #d
024 7 $a10.1016/S0093-691X(01)00460-5$2DOI
100 1 $aVIÑOLES, C.
245 $aEffect of long-term and short-term progestagen treatment on follicular development and pregnancy rate in cyclic ewes.
260 $c2001
500 $aArticle history:Received for publication: September 28, 1999/ Accepted: May 1, 2000.
520 $aAbstract. The aim of this study was to evaluate the effect of the length of a progestagen treatment (12 d vs. 6 d) on follicular dynamics, estrus synchronization and pregnancy rate using medroxyprogesterone acetate (MAP) with or without an eCG dose at the end of MAP treatment. One hundred sixty Polwarth ewes were divided into four equal groups: long-term treated (LT, n=40); short-term treated (ST, n=40); long-term treated plus eCG (LTeCG, n=40); and short-term treated plus eCG (STeCG, n=40). Five ewes of each group were separated to undergo daily transrectal ultrasonography, and blood samples were taken for hormone determination. Until 96 h after sponge withdrawal the number of ewes in estrus was higher in both long-term-treated groups than in both short-term-treated groups but at the end of the observational period (144 h) no significant differences were found among groups. The pregnancy rate was higher in the ST group (87%) than in the other groups (LT, 63%; LTeCG, 67%; and STeCG, 58%; P< or =0.03). The ovulatory follicle emerged before sponge withdrawal in long-term-treated ewes (-3.8+/-0.4 d and -2.2+/-0.8 d for LT and LTeCG, respectively), whereas in short-term-treated ewes it emerges around sponge removal (0.4+/-1.1 d and 0.5+/-0.5 d for ST and STeCG, respectively; P< or =0.01). The ovulatory follicle in the LT group had a longer lifespan and attained a larger (P< or =0.05) maximum diameter than in the ST group. We conclude: a) that the lower pregnancy rate observed after long-term progestagen treatment was related to a slower follicular turnover that promoted the ovulation of persistent dominant follicles; (b) that short-term treatment resulted in a higher pregnancy rate probably due to the ovulation of newly recruited growing follicles; and (c) treatment with eCG had no advantage in association with long-term treatment and had a deleterious effect in combination with short-term treatment with MAP
653 $aEWES
653 $aFERTILITY
653 $aOVARIAN DYNAMICS
653 $aPREÑEZ EN OVEJA
653 $aPROGESTAGEN
653 $aULTRASONOGRAPHY
700 1 $aFORSBERG, M.
700 1 $aBANCHERO, G.
700 1 $aRUBIANES, E.
773 $tTheriogenology, 1 March 2001, Volume 55, Issue 4, Pages 993-1004
Descargar
Esconder MarcPresentar Marc Completo |
|
Registro original : |
INIA La Estanzuela (LE) |
|
|
Biblioteca
|
Identificación
|
Origen
|
Tipo / Formato
|
Clasificación
|
Cutter
|
Registro
|
Volumen
|
Estado
|
Volver
|
|
|
| Registros recuperados : 7 | |
| 4. |  | VIÑOLES, C.; FORSBERG, M.; BANCHERO, G.; RUBIANES, E. Effect of long-term and short-term progestagen treatment on follicular development and pregnancy rate in cyclic ewes. Theriogenology, 1 March 2001, Volume 55, Issue 4, Pages 993-1004 Article history:Received for publication: September 28, 1999/ Accepted: May 1, 2000.| Tipo: Artículos en Revistas Indexadas Internacionales | Circulación / Nivel : A - 2 |
| Biblioteca(s): INIA La Estanzuela. |
|    |
| 6. | | RUBIANES, E.; KMAID, S.; UNGERFELD, R.; IBARRA, D.; VIÑOLES, C.; DE CASTRO, T.; CARBAJAL, B. Superovulación y transferencia de embriones en ovinos lecheros. ln: INIA LAS BRUJAS. Producción de leche ovina. Reunión de divulgación, 23 setiembre, Canelones, 1993. Canelones (Uruguay): INIA, 1993. p. 11-12| Biblioteca(s): INIA Las Brujas. |
|  |
| 7. | | RUBIANES, E.; KMAID, S.; CASTRO, T. DE; CARBAJAL, B.; UNGERFELD, R.; VIÑOLES, C.; RIVERO, A.; PINCZAK, A.; BENQUET, N. Tratamientos superovulatorios iniciados en relación a la emergencia de la primer onda folicular en la oveja. ln: Congreso Uruguayo de Producción Animal, 1 : 1996 Oct 2-4 : Montevideo Memorias. Montevideo: AUPA ; Facultad de Agronomía, 1996. p. 58-62 Declarado de Interés nacional.| Tipo: Trabajos en Congresos/Conferencias |
| Biblioteca(s): INIA Tacuarembó. |
| |
| Registros recuperados : 7 | |
|
| Expresión de búsqueda válido. Check! |
|
|
