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Fecha Publicación: 2009-12-18
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Uribe Velásquez, L. F. ., Restrepo Cadavid, R. ., & Henry Osorio, J. . (2009). Respostas foliculares e endócrinas em ovelhas após sincronização do estro usando progesterona, prostaglandinas (PGF2a) e gonadotrofinas. Revista Veterinaria Y Zootecnia (On Line), 3(2), 14–27. Recuperado a partir de https://revistasojs.ucaldas.edu.co/index.php/vetzootec/article/view/5627
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RESUMO: A estacionalidade reprodutiva em ovelhas e cabras é a maior limitante no melhoramento produtivo. O controle da estacionalidade em ovelhas é uma importante ferramenta no seu manejo. Vários tratamentos tem sido propostos para o controle da estacionalidade. O melhoramento da eficiência reprodutiva mediante a indução da sincronização pode ser acompanhado de tratamentos hormonais que incluem gonadotropinas, progestagenos e agentes luteolíticos como a prostaglandina F2α. A sincronização do estro é aplicada eficientemente nas técnicas de reprodução assistida tales como a inseminação artificial e a transferência de embriões em pequenos ruminantes. A sincronização do estro em pequenos ruminantes é caracterizada por reduzir a duração da fase luteal do ciclo estral com prostagandinas F2α ou por extender-a com progesterona exógena ou progestagenos potentes. O uso da prostaglandina tem sido limitado a estação reprodutiva (corpo luteo ativo), partindo disto diferentes protocolos para a sincronização do estro usando progesrerona ou progestágenos tem sido introducidos. A impregnação de esponjas intravaginais com progestágenos tem sido amplamente usados em ovelhas e cabras para o controle do estrous e da ovulação durante a estação reprodutiva e não reprodutiva. O dispositivo interno liberador de hormônios (CIDR) tem sido efetivo no controle do estro e da ovulação em ovelhas. Em pequenos ruminantes, o CIDR unido com a gonadotrofina coriônica eqüina (eCG) tem sido regularmente usado nos programas de IATF. O objetivo desta revisão foi avaliar a eficiência dos métodos mais utilizados para a sincronização do estro em fêmeas ovinas e sua variação na resposta ovariana, fertilidade e concentrações hormonais.
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Acritopoulou, S., Haresign, W., Foster, J.P., Lamming, G.E. Plasma progesterone and LH concentrations in ewes after injection of an analogue of prostaglandin F-2. Journal of Reproduction Fertility, v.49, p.337-340, 1977.
Baird, D.T., Scaramuzzi, R.J. Changes in the secretion of ovarian steroids and pituitary luteinizing hormone in the peri-ovulatory period in the ewe: The effect of progesterone. Journal of Endocrinology, v.70, p.237-45, 1976.
Baird, D.T., Swanston, I.A., McNeilly, A.S. Relationship between LH, FSH, and prolactin concentration and the secretion of androgens and estrogens by the preovulatory follicle in the ewe. Biology of Reproduction, v.24, p.1013-25, 1981.
Bevers, M.M., Dieleman, S.J., Van Tol, H.T.M., Blankenstein, D.M., Van Den Broek, J. Changes in pulsatile secretion patterns of LH, FSH, progesterone, androstenedione and oestradiol in cows after superovulation with PMSG Journal of Reproduction Fertility, v.87, p.745-54, 1989.
Bindon, B.M., Blanc, M.R., Pelletier, J., Terqui, M., Thimonier, J. Periovulatory gonadotrophin and ovarian steroid patterns in sheep of breeds with differing fecundity. Journal of Reproduction Fertility, v.55, p.15-25, 1979.
Campbell, B.K., Mann, G.E., McNeilly, A.S., Baird, D.T. The pattern of ovarian inhibin, estradiol, and androstenedione secretion during the estrous cycle of the ewe. Endocrinology, v.127, p.227- 35, 1990.
Cardwell, B.E., Fitch, G.Q., Geisert, R.D. Ultrasonic evaluation for the time of ovulation in ewes treated with norgestomet and norgestomet followed by pregnant mare’s serum gonadotropin. Journal of Animal Science, v.76, p.2235-38, 1998.
Castonguay, F., Dufour, J.J., Minvielle, F., Estrada, R. Follicular dynamics and dominance in Boorola x Finnish Landrace and Boorola x Suffolk ewes heterozygous for the F gene. Journal Reproduction Fertility, v. 89, p. 193-203, 1990.
Chagas, L.M., Souza, C.J.H., Moura, A., Moraes, J.C.F. Viabilidade do emprego de uma minidose de prostaglandina na sincronização de cios em ovinos. Ciência Rural, v.24, p.355-8, 1994.
Chamley, W.A., Buckmaster, J.M., Cain, M.D., Cerini, J., Cerini, M.E., Cumming, I.A., Goding, J.R. The effect of prostaglandin F2α on progesterone, oestradiol and luteinizing hormone secretion in sheep with ovarian transplants. Journal of Endocrinology, v.55, p.253-63, 1972.
Donrov, T.S., Batsaihan, D., Ley, W.B. Gonadotrophin extraction from pregnant mare’s serum and effect of PMSG preparation on the fertility of Mongolian native ewes. Small Ruminant Research, v.28, p.61- 66, 1998.
Dott, H.M., Hay, M.F., Cran, D.G., Moor, R.M. Effect of exogenous gonadotrophin (PMSG) on the antral follicle population in the sheep. Journal of Reproduction Fertility, v.56, p.683-9, 1979.
Driancourt, M.A., Gibson, W.R., Cahill, L.P. Follicular dynamics throught the oestrus cycle in sheep. A review. Reproduction Nutrition Development, v.25, p.1-15, 1985.
Driancourt, M.A., Gougeon, A., Royère, D., Thibault, C. Ovarian function. In: Thibault, C., Levasseur, M.C. Reproduction in mammals and man. R.H.F. Hunter, 1993. Chap.15, p.283-305.
Driancourt, M.A., Thatcher, W.W., Terqui, M. Dynamics of ovarian follicular develoment in cattle during the estrous cycle, early pregnancy and in response to PMSG. Domestic Animal Endocrinology, v.8, p.209-221, 1991.
Duchens, M., Gustafsson, H., Rodríguez-Martínez, H., Forsberg, M., Edqvist, L.E. Effect of induced suprabasal progesterone concentrations on follicular dynamics in heifers. Reproduction in Domestic Animals, v.29, p.315-25, 1994.
Echternkamp, S.E., Bolt, D.J., Hawk, H.W. Ovarian and pituitary hormones in blood of progestogentreated ewes. Journal of Animal Science, v.42, p.893-901, 1976.
Evans, G., Robinson, T.J. The control of fertility in sheep: endocrine and ovarian responses to progestagen-PMSG treatment in the breeding season and in anoestrus. Journal of Agricultural Science, v.94, p.69-88, 1980.
Gardón, J.C., Simonetti, L. Residual levels on medroxyprogesterone acetate-impregnated sponges after estrus synchronization treatment and their relationship with fertility in cyclic goats. Brazilian Journal of Veterinary Research and Animal Science, v.34, p.163-6, 1997.
Ginther, O.J. Influence of progesterone and number of corpora lutea on ovaries in sheep. American Journal of Veterinary Research, v.32, p.1987- 92, 1971.
Godfrey, R.W., Gray, L., Collins, J.R. Estrus synchronization of sheep in the tropics using either controlled internal drug release (CIDR) dispensers or prostaglandin F2α (PGF). Journal of Animal Science, v.73, Suppl.1, p.232, 1995.
González de Bulnes, A., Moreno, J.S., Garcia, L.M., Gomez, B.A., Lopez, S.A. Observación del ovario en la oveja y eficacia en la detección de folículos y cuerpos lúteos mediante ecografía transrectal. Investigación Agraria. Producción y Sanidad Animal, v.9, p.319-329, 1994.
Greyling, J.P.C., Brink, W.C.J. Synchronization of oestrus in sheep: The use of controlled internal drug release (CIDR) dispensers. South Africa Tydskr Veek, v. 17, p.128-132, 1987.
Greyling, J.P.C., Van Der Westhuysen, J.M. The synchronization of oestrus in sheep. 2. Dose effect of prostaglandin in the double injection regime. South African Journal of Animal Science, v.9, p.193-5, 1979.
Hackett, A.J., Robertson, H.A. Effect of dose and time of injection of prostaglandin F 2α in cycling ewes. Theriogenology, v.13, p.347-51, 1980.
Hamra, A.H., Massri, Y.G., Marcek, J.M., Wheaton, J.E. Plasma progesterone levels in ewes treated with progesterone-controlled drug-release dispenser, implants and esponges. Animal Reproduction Science, v.11, p.187-194, 1986.
Herrera, H.L., Feldman, S.D., Zarco, Q.L., Valencia, M.J., Ortiz, H.A., Angeles, C.S. Evaluación del efecto luteolítico de la prostaglandina F2 alfa en diferentes días del ciclo estral de la borrega. Veterinaria México, v.21, p.143-7, 1990.
Hunnicutt, L.K., Stobart, R.H., Townsend, R.S., Aimone-Lupher, C.E. Eazi-breed CIDR devices versus prostaglandin F2α for synchronization of estrus in mature range ewes. Journal of Animal Science, v.50, Suppl.1, p.241, 1995.
Johnson, S.K., Dailey, R.A., Inskeep, E.K., Lewis, P.E. Effect of peripheral concentrations of progesterone on follicular growth and fertility in ewes. Domestic Animal Endocrinology, v.13, p.69-79, 1996.
Karsch, F.J., Foster, D.L., Legan, S.J., Ryan, K.D., Peter, G.K. Control of the preovulatory endocrine events in the ewe: Interrelationship of estradiol, progesterone, and luteinizing hormone. Endocrinology, v.105, p.421-6, 1979.
Kouskoura, T.H., Kouimtzis, S., Alexaki, E., Smokovitis, A. Comparative studies of ovarian steroids in blood, and specific proteolytic enzymes in the cervical mucus, in four sheep breeds after oestrus synchronization (Progesterone and PMSG). 1. Breed variation of oestradiol-17β and progesterone in blood during natural oestrus,
synchronization oestrus, and the first oestrus after synchronized oestrus. Reproduction in Domestic Animals, v.30, p.8-13, 1995.
Kruip, A.M., Brand, A. Follicular growth during the normal cycle and after treatment with progestagens in the ewe. Annales Biology of Animal Biochemistry Biophys, v.15, p.191- 204, 1975.
Langford, G.A. Influence of PMSG and time of artificial insemination on fertility of progestogentreated sheep in confinement Journal of Animal Science, v.54, p.1205-1211, 1982.
Leyva, V., Buckrell, B.C., Walton, J.S. Regulation of follicular and ovulation in ewes by exogenous progestagen. Theriogenology, v.50, p.395-416, 1998.
López-Sebastian, A. Descarga preovulatoria de LH y momento de la ovulación en ovejas con celo inducido mediante progestágenos y PMSG. Investigación Agraria. Producción y Sanidad Animal, v.6, p.123-130, 1991.
Martin, G.B. Factors affecting the secretion of luteinizing hormone in the ewe. Biology Reviews, v.59, p.1-87, 1984.
McNatty, K.P., Gibb, M., Dobson, C., Ball, K., Coster, J., Heath, D., Thurley, D.C. Preovulatory follicular development in sheep treated with PMSG and/or prostaglandin. Journal of Reproduction Fertility, v.65, p.111-123, 1982.
McNatty, K.P., Henderson, K.M., Lun, S., Heath, D.A., Ball, K., Hudson, N.L., Fannin, J., Gibb, M., Kieboom, L.E., Smith, P. Ovarian activity in Booroola x Romney ewes which have a major gene influencing their ovulation rate Journal of Reproduction Fertility, v.73, p.109-20, 1985.
McNeilly, A.S., Picton, H.M., Campbell, B.K., Baird, D.T. Gonadotrofic control of follicle growth in the ewe. Journal of Reproduction Fertility, Supplement 43, p.177-186, 1991.
Mihm, M., Diskin, M.G., Roche, J.F. Regulation of follicle wave growth in cattle. Reproduction in Domestic Animals, v.31, p.531-538, 1996.
Moraes, J.C.F., Souza, C.J.H, Collares, R.S. Situação atual e perspectivas da inseminação artificial em ovinos. Revista Brasileira de Reprodução Animal, v.22, p.87-91, 1998.
Naqvi, S.M.K., Gulyani, R., Pmittal, J. Estrus synchronization response in Kheri ewes treated with prostaglandin F2 α. Indian Journal of Animal Sciences, v.68, p 564-5, 1998.
Noel, B., Bister, J.L., Pierquin, B., Paquay, R. Effects of FGA and PMSG on follicular growth and LH secretion in Suffolk ewes. Theriogenology, v.41, p.719-727, 1994.
Ottobre, J.S., Lewis, G.S., Thayne, W.V., Inskeep, E.K. Mechanism by wich progesterone shortens the estrous cycle of the ewe. Biology of Reproduction, v.23, p.1046-53, 1980.
Oyedipe, E.O., Pathiraja, N., Gyang, E.O., Edqvist, L.E. Effect of dose of pregnant mare serum gonadotrophin on estrus parameters, ovulation rate and peripheral progesterone concentrations in Yankasa ewes. Animal Reproduction Science, v.20, p.255-64, 1989.
Pearce, D.T., Robinson, T.J. Plasma progesterone concentrations, ovarian and endocrinological responses and sperm transport in ewes with synchronized oestrus. Journal of Reproduction Fertility, v.75, p.49-62, 1985.
Rubianes, E., Ungerfeld, R., Viñoles, C., Rivero, A., Adams, G. Ovarian response to superstimulatory treatment initiated relative to wave emergency in ultrasonographically monitored ewes. Theriogenology, v.47, p.1479-88, 1997.
Rubianes. E., castro, t., kmaid, S. Estrus response after a short progesterone priming in seasonally anestrous goats. Theriogenology, v. 49, p. 356- 362, 1998.
Schoenemann, H.M., Hallford, D. M. Influence of fluorogestone acetate on serum progesterone and histological characteristics in ewes. Animal Production, v.35, p.321-6, 1982.
Schrick, F.N., Surface, R.A., Pritchard, J.Y., Dailey, R.A., Townsend, E.C., Inskeep, E.K. Ovarian structures during the estrous cycle and early pregnancy in ewes. Biology of Reproduction, v.49, p.1133-40, 1993.
Scudamore, C.L., McEvoy, T.G., Aitken, R.P., Robinson, J.J., Robertson, I.S. The effect of two differents levels of progesterone priming on the response of ewes to superovulation. Theriogenology, v.39, p.433-42, 1993.
Sirois, J., Fortune, J.E. Lengthening of the bovine estrous cycle with low levels of exogenous progesterone: a model for studying ovarian follicular dominance. Endocrinology, v.127, p.916-25, 1990.
Taylor, C., Manikkam, M. High circulating levels of progesterone early in the estrous cycle can alter follicular dynamics in heifers. Biology of Reproduction, v.48, Suppl.1, p.119, 1993.
Turnbull, K.E., Braden, A.W.H., Mattner, P.E. The pattern of follicular growth and atresia in the ovine ovary. Australian Journal of Biological Sciences, v.30, p.229-241, 1997.
Uribe-Velásquez, L.F.; Oba, E.; Lara-Herrera, L.C.; et al. Respostas endócrinas e ovarianas associadas com o folículo dominante da primeira onda folicular em ovelhas sincronizadas com CIDR ou PGF2α. Revista Brasileira de Zootecnia, v.31, n.2, p.944-953, 2002.
Uribe-Velásquez, L.F.; Oba, E.; Souza, M.I.L. Efeitos da progesterona exógena sobre o desenvolvimento folicular em ovelhas. Arquivos Brasileiros de Medicina Veterinária e Zootecnia, v.60, n.1, p. 58-65, 2008a.
Uribe-Velásquez, L.F.; Souza, M.I.L.; Loaiza, A.M. Efecto de la sincronización del estro con prostaglandina-F2α vs CIDR + 500 UI de eCG en ovejas Bergamacia durante el inicio de la fase luteal. Revista Científica, v.XVIII, n.4, p.368- 373, 2008b.
Uribe-Velásquez, L.F.; Oba, E.; Souza, M.I.L. Población folicular y concentraciones plasmáticas de progesterona (P4 ) en ovejas sometidas a diferentes protocolos de sincronización. Archivos de Medicina Veterinaria, v.40, p.83- 88, 2008c.
Uribe-Velásquez, L.F.; Souza, M.I.L.; Osorio, J.H. Avaliação ultra-sonográfica e endócrina da resposta ovariana de cabras submetidas ao tratamento com implantes de progesterona por 14 dias seguida de diferentes doses de eCG, 2009 (In press).
Wheaton, J.E., Carlson, K.M., Windels, H.F., Johnston, L.J. CIDR: A new progesteronereleasing intravaginal device for induction of estrus and cycle control in sheep and goats.
Animal Reproduction Science, v.33, p.127-41, 1993.
Wherman, M.E., Roberson, M.S., Cupp, A.S., Kojima, F.N., Stumpf, T.T., Werth, L.A., Wolfe, M.W., Kittok, R.J., Kinder, J.E. Increasing exogenous progesterone during synchronization of estrus decreases endogenous 17β-estradiol and increases conception in cows. Biology of Reproduction, v.49, p.214-20, 1993.
Baird, D.T., Scaramuzzi, R.J. Changes in the secretion of ovarian steroids and pituitary luteinizing hormone in the peri-ovulatory period in the ewe: The effect of progesterone. Journal of Endocrinology, v.70, p.237-45, 1976.
Baird, D.T., Swanston, I.A., McNeilly, A.S. Relationship between LH, FSH, and prolactin concentration and the secretion of androgens and estrogens by the preovulatory follicle in the ewe. Biology of Reproduction, v.24, p.1013-25, 1981.
Bevers, M.M., Dieleman, S.J., Van Tol, H.T.M., Blankenstein, D.M., Van Den Broek, J. Changes in pulsatile secretion patterns of LH, FSH, progesterone, androstenedione and oestradiol in cows after superovulation with PMSG Journal of Reproduction Fertility, v.87, p.745-54, 1989.
Bindon, B.M., Blanc, M.R., Pelletier, J., Terqui, M., Thimonier, J. Periovulatory gonadotrophin and ovarian steroid patterns in sheep of breeds with differing fecundity. Journal of Reproduction Fertility, v.55, p.15-25, 1979.
Campbell, B.K., Mann, G.E., McNeilly, A.S., Baird, D.T. The pattern of ovarian inhibin, estradiol, and androstenedione secretion during the estrous cycle of the ewe. Endocrinology, v.127, p.227- 35, 1990.
Cardwell, B.E., Fitch, G.Q., Geisert, R.D. Ultrasonic evaluation for the time of ovulation in ewes treated with norgestomet and norgestomet followed by pregnant mare’s serum gonadotropin. Journal of Animal Science, v.76, p.2235-38, 1998.
Castonguay, F., Dufour, J.J., Minvielle, F., Estrada, R. Follicular dynamics and dominance in Boorola x Finnish Landrace and Boorola x Suffolk ewes heterozygous for the F gene. Journal Reproduction Fertility, v. 89, p. 193-203, 1990.
Chagas, L.M., Souza, C.J.H., Moura, A., Moraes, J.C.F. Viabilidade do emprego de uma minidose de prostaglandina na sincronização de cios em ovinos. Ciência Rural, v.24, p.355-8, 1994.
Chamley, W.A., Buckmaster, J.M., Cain, M.D., Cerini, J., Cerini, M.E., Cumming, I.A., Goding, J.R. The effect of prostaglandin F2α on progesterone, oestradiol and luteinizing hormone secretion in sheep with ovarian transplants. Journal of Endocrinology, v.55, p.253-63, 1972.
Donrov, T.S., Batsaihan, D., Ley, W.B. Gonadotrophin extraction from pregnant mare’s serum and effect of PMSG preparation on the fertility of Mongolian native ewes. Small Ruminant Research, v.28, p.61- 66, 1998.
Dott, H.M., Hay, M.F., Cran, D.G., Moor, R.M. Effect of exogenous gonadotrophin (PMSG) on the antral follicle population in the sheep. Journal of Reproduction Fertility, v.56, p.683-9, 1979.
Driancourt, M.A., Gibson, W.R., Cahill, L.P. Follicular dynamics throught the oestrus cycle in sheep. A review. Reproduction Nutrition Development, v.25, p.1-15, 1985.
Driancourt, M.A., Gougeon, A., Royère, D., Thibault, C. Ovarian function. In: Thibault, C., Levasseur, M.C. Reproduction in mammals and man. R.H.F. Hunter, 1993. Chap.15, p.283-305.
Driancourt, M.A., Thatcher, W.W., Terqui, M. Dynamics of ovarian follicular develoment in cattle during the estrous cycle, early pregnancy and in response to PMSG. Domestic Animal Endocrinology, v.8, p.209-221, 1991.
Duchens, M., Gustafsson, H., Rodríguez-Martínez, H., Forsberg, M., Edqvist, L.E. Effect of induced suprabasal progesterone concentrations on follicular dynamics in heifers. Reproduction in Domestic Animals, v.29, p.315-25, 1994.
Echternkamp, S.E., Bolt, D.J., Hawk, H.W. Ovarian and pituitary hormones in blood of progestogentreated ewes. Journal of Animal Science, v.42, p.893-901, 1976.
Evans, G., Robinson, T.J. The control of fertility in sheep: endocrine and ovarian responses to progestagen-PMSG treatment in the breeding season and in anoestrus. Journal of Agricultural Science, v.94, p.69-88, 1980.
Gardón, J.C., Simonetti, L. Residual levels on medroxyprogesterone acetate-impregnated sponges after estrus synchronization treatment and their relationship with fertility in cyclic goats. Brazilian Journal of Veterinary Research and Animal Science, v.34, p.163-6, 1997.
Ginther, O.J. Influence of progesterone and number of corpora lutea on ovaries in sheep. American Journal of Veterinary Research, v.32, p.1987- 92, 1971.
Godfrey, R.W., Gray, L., Collins, J.R. Estrus synchronization of sheep in the tropics using either controlled internal drug release (CIDR) dispensers or prostaglandin F2α (PGF). Journal of Animal Science, v.73, Suppl.1, p.232, 1995.
González de Bulnes, A., Moreno, J.S., Garcia, L.M., Gomez, B.A., Lopez, S.A. Observación del ovario en la oveja y eficacia en la detección de folículos y cuerpos lúteos mediante ecografía transrectal. Investigación Agraria. Producción y Sanidad Animal, v.9, p.319-329, 1994.
Greyling, J.P.C., Brink, W.C.J. Synchronization of oestrus in sheep: The use of controlled internal drug release (CIDR) dispensers. South Africa Tydskr Veek, v. 17, p.128-132, 1987.
Greyling, J.P.C., Van Der Westhuysen, J.M. The synchronization of oestrus in sheep. 2. Dose effect of prostaglandin in the double injection regime. South African Journal of Animal Science, v.9, p.193-5, 1979.
Hackett, A.J., Robertson, H.A. Effect of dose and time of injection of prostaglandin F 2α in cycling ewes. Theriogenology, v.13, p.347-51, 1980.
Hamra, A.H., Massri, Y.G., Marcek, J.M., Wheaton, J.E. Plasma progesterone levels in ewes treated with progesterone-controlled drug-release dispenser, implants and esponges. Animal Reproduction Science, v.11, p.187-194, 1986.
Herrera, H.L., Feldman, S.D., Zarco, Q.L., Valencia, M.J., Ortiz, H.A., Angeles, C.S. Evaluación del efecto luteolítico de la prostaglandina F2 alfa en diferentes días del ciclo estral de la borrega. Veterinaria México, v.21, p.143-7, 1990.
Hunnicutt, L.K., Stobart, R.H., Townsend, R.S., Aimone-Lupher, C.E. Eazi-breed CIDR devices versus prostaglandin F2α for synchronization of estrus in mature range ewes. Journal of Animal Science, v.50, Suppl.1, p.241, 1995.
Johnson, S.K., Dailey, R.A., Inskeep, E.K., Lewis, P.E. Effect of peripheral concentrations of progesterone on follicular growth and fertility in ewes. Domestic Animal Endocrinology, v.13, p.69-79, 1996.
Karsch, F.J., Foster, D.L., Legan, S.J., Ryan, K.D., Peter, G.K. Control of the preovulatory endocrine events in the ewe: Interrelationship of estradiol, progesterone, and luteinizing hormone. Endocrinology, v.105, p.421-6, 1979.
Kouskoura, T.H., Kouimtzis, S., Alexaki, E., Smokovitis, A. Comparative studies of ovarian steroids in blood, and specific proteolytic enzymes in the cervical mucus, in four sheep breeds after oestrus synchronization (Progesterone and PMSG). 1. Breed variation of oestradiol-17β and progesterone in blood during natural oestrus,
synchronization oestrus, and the first oestrus after synchronized oestrus. Reproduction in Domestic Animals, v.30, p.8-13, 1995.
Kruip, A.M., Brand, A. Follicular growth during the normal cycle and after treatment with progestagens in the ewe. Annales Biology of Animal Biochemistry Biophys, v.15, p.191- 204, 1975.
Langford, G.A. Influence of PMSG and time of artificial insemination on fertility of progestogentreated sheep in confinement Journal of Animal Science, v.54, p.1205-1211, 1982.
Leyva, V., Buckrell, B.C., Walton, J.S. Regulation of follicular and ovulation in ewes by exogenous progestagen. Theriogenology, v.50, p.395-416, 1998.
López-Sebastian, A. Descarga preovulatoria de LH y momento de la ovulación en ovejas con celo inducido mediante progestágenos y PMSG. Investigación Agraria. Producción y Sanidad Animal, v.6, p.123-130, 1991.
Martin, G.B. Factors affecting the secretion of luteinizing hormone in the ewe. Biology Reviews, v.59, p.1-87, 1984.
McNatty, K.P., Gibb, M., Dobson, C., Ball, K., Coster, J., Heath, D., Thurley, D.C. Preovulatory follicular development in sheep treated with PMSG and/or prostaglandin. Journal of Reproduction Fertility, v.65, p.111-123, 1982.
McNatty, K.P., Henderson, K.M., Lun, S., Heath, D.A., Ball, K., Hudson, N.L., Fannin, J., Gibb, M., Kieboom, L.E., Smith, P. Ovarian activity in Booroola x Romney ewes which have a major gene influencing their ovulation rate Journal of Reproduction Fertility, v.73, p.109-20, 1985.
McNeilly, A.S., Picton, H.M., Campbell, B.K., Baird, D.T. Gonadotrofic control of follicle growth in the ewe. Journal of Reproduction Fertility, Supplement 43, p.177-186, 1991.
Mihm, M., Diskin, M.G., Roche, J.F. Regulation of follicle wave growth in cattle. Reproduction in Domestic Animals, v.31, p.531-538, 1996.
Moraes, J.C.F., Souza, C.J.H, Collares, R.S. Situação atual e perspectivas da inseminação artificial em ovinos. Revista Brasileira de Reprodução Animal, v.22, p.87-91, 1998.
Naqvi, S.M.K., Gulyani, R., Pmittal, J. Estrus synchronization response in Kheri ewes treated with prostaglandin F2 α. Indian Journal of Animal Sciences, v.68, p 564-5, 1998.
Noel, B., Bister, J.L., Pierquin, B., Paquay, R. Effects of FGA and PMSG on follicular growth and LH secretion in Suffolk ewes. Theriogenology, v.41, p.719-727, 1994.
Ottobre, J.S., Lewis, G.S., Thayne, W.V., Inskeep, E.K. Mechanism by wich progesterone shortens the estrous cycle of the ewe. Biology of Reproduction, v.23, p.1046-53, 1980.
Oyedipe, E.O., Pathiraja, N., Gyang, E.O., Edqvist, L.E. Effect of dose of pregnant mare serum gonadotrophin on estrus parameters, ovulation rate and peripheral progesterone concentrations in Yankasa ewes. Animal Reproduction Science, v.20, p.255-64, 1989.
Pearce, D.T., Robinson, T.J. Plasma progesterone concentrations, ovarian and endocrinological responses and sperm transport in ewes with synchronized oestrus. Journal of Reproduction Fertility, v.75, p.49-62, 1985.
Rubianes, E., Ungerfeld, R., Viñoles, C., Rivero, A., Adams, G. Ovarian response to superstimulatory treatment initiated relative to wave emergency in ultrasonographically monitored ewes. Theriogenology, v.47, p.1479-88, 1997.
Rubianes. E., castro, t., kmaid, S. Estrus response after a short progesterone priming in seasonally anestrous goats. Theriogenology, v. 49, p. 356- 362, 1998.
Schoenemann, H.M., Hallford, D. M. Influence of fluorogestone acetate on serum progesterone and histological characteristics in ewes. Animal Production, v.35, p.321-6, 1982.
Schrick, F.N., Surface, R.A., Pritchard, J.Y., Dailey, R.A., Townsend, E.C., Inskeep, E.K. Ovarian structures during the estrous cycle and early pregnancy in ewes. Biology of Reproduction, v.49, p.1133-40, 1993.
Scudamore, C.L., McEvoy, T.G., Aitken, R.P., Robinson, J.J., Robertson, I.S. The effect of two differents levels of progesterone priming on the response of ewes to superovulation. Theriogenology, v.39, p.433-42, 1993.
Sirois, J., Fortune, J.E. Lengthening of the bovine estrous cycle with low levels of exogenous progesterone: a model for studying ovarian follicular dominance. Endocrinology, v.127, p.916-25, 1990.
Taylor, C., Manikkam, M. High circulating levels of progesterone early in the estrous cycle can alter follicular dynamics in heifers. Biology of Reproduction, v.48, Suppl.1, p.119, 1993.
Turnbull, K.E., Braden, A.W.H., Mattner, P.E. The pattern of follicular growth and atresia in the ovine ovary. Australian Journal of Biological Sciences, v.30, p.229-241, 1997.
Uribe-Velásquez, L.F.; Oba, E.; Lara-Herrera, L.C.; et al. Respostas endócrinas e ovarianas associadas com o folículo dominante da primeira onda folicular em ovelhas sincronizadas com CIDR ou PGF2α. Revista Brasileira de Zootecnia, v.31, n.2, p.944-953, 2002.
Uribe-Velásquez, L.F.; Oba, E.; Souza, M.I.L. Efeitos da progesterona exógena sobre o desenvolvimento folicular em ovelhas. Arquivos Brasileiros de Medicina Veterinária e Zootecnia, v.60, n.1, p. 58-65, 2008a.
Uribe-Velásquez, L.F.; Souza, M.I.L.; Loaiza, A.M. Efecto de la sincronización del estro con prostaglandina-F2α vs CIDR + 500 UI de eCG en ovejas Bergamacia durante el inicio de la fase luteal. Revista Científica, v.XVIII, n.4, p.368- 373, 2008b.
Uribe-Velásquez, L.F.; Oba, E.; Souza, M.I.L. Población folicular y concentraciones plasmáticas de progesterona (P4 ) en ovejas sometidas a diferentes protocolos de sincronización. Archivos de Medicina Veterinaria, v.40, p.83- 88, 2008c.
Uribe-Velásquez, L.F.; Souza, M.I.L.; Osorio, J.H. Avaliação ultra-sonográfica e endócrina da resposta ovariana de cabras submetidas ao tratamento com implantes de progesterona por 14 dias seguida de diferentes doses de eCG, 2009 (In press).
Wheaton, J.E., Carlson, K.M., Windels, H.F., Johnston, L.J. CIDR: A new progesteronereleasing intravaginal device for induction of estrus and cycle control in sheep and goats.
Animal Reproduction Science, v.33, p.127-41, 1993.
Wherman, M.E., Roberson, M.S., Cupp, A.S., Kojima, F.N., Stumpf, T.T., Werth, L.A., Wolfe, M.W., Kittok, R.J., Kinder, J.E. Increasing exogenous progesterone during synchronization of estrus decreases endogenous 17β-estradiol and increases conception in cows. Biology of Reproduction, v.49, p.214-20, 1993.
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