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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
01/07/2004 |
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Data da última atualização: |
01/07/2004 |
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Autoria: |
MENCHACA, A.; RUBIANES, E. |
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Título: |
Relation between progesterone concentrations during the early luteal phase and follicular dynamics in goats. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
Theriogenology, v. 57, n. 5, p. 1411-1419, 2002. |
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Idioma: |
Inglês |
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Conteúdo: |
We studied the relationship between progesterone (P 4) concentrations early in the estrus cycle and follicular dynamics in dairy goats. We used seven untreated goats (control group) and six progesterone treated goats (P group) with a controlled internaI drug release device from Days 0 to 5 (Day 0: day of ovulation). We performed daily ultrasonograph during the interovulatory interval to determine ovarian change and took daily blood samples to determine serum estradiol 17Betha (E2) and P4 concentrations by RIA. We divided the control goats into 3- (n = 4) and 4-wave goats (n = 3), according to the number of follicular waves recorded during the ovulatory cycle. Mean progesterone concentrations between Days 1 and 5 were higher and mean estradiol concentrations between Days 3 and 5 were lower in 4-wave goats (P4: 3.8 +- 0.2 ng/ml; E2: 1.6 +- 0.2 pg/ml) than in 3-wave goats (P4: 2.0 +- 0.5 ng/ml, P <= 0.05; E2: 4.4 +- 0.9 Pg/ml, P <= 0.05). Wave 2 emerged earlier in 4-wave (Day 4.2 +- 0.3) than in 3-wave goats (Day 7.3 +- 0.3, P <= 0.05). Three out of six of the progesterone-treated goats had short cycles (mean 8.0 +- 0.0 days) and ovulated from Wave 1. The other three goats had shorter cycles (mean 18.3 +- 0.3 days) than the control group (20.0 +- 0.2 days; P <= 0.05), although they were within the normal range of control cycles (shortened cycles). ln the three treated goats with shortened cycles (two with four waves, one with three waves), mean progesterone concentrations between Days 1 and 5 were higher (4.7 +- 0.6 ng/ml) than in the 3-wave control goats. ln these goats, Wave 2 emerged at Day 4.3 +- 0.3, similar to the time observed in 4-wave goats but earlier (P<= 0.05) than in 3-wave control goats. Overall results confirm a relationship between the progesterone levels and the follicular wave turnover during the early luteal phase in the goat. Higher progesterone concentrations may accelerate follicular turnover probably by an early decline of the negative feedback action of the largest follicle of Wave 1. This is followed by an early emergence of Wave 2. MenosWe studied the relationship between progesterone (P 4) concentrations early in the estrus cycle and follicular dynamics in dairy goats. We used seven untreated goats (control group) and six progesterone treated goats (P group) with a controlled internaI drug release device from Days 0 to 5 (Day 0: day of ovulation). We performed daily ultrasonograph during the interovulatory interval to determine ovarian change and took daily blood samples to determine serum estradiol 17Betha (E2) and P4 concentrations by RIA. We divided the control goats into 3- (n = 4) and 4-wave goats (n = 3), according to the number of follicular waves recorded during the ovulatory cycle. Mean progesterone concentrations between Days 1 and 5 were higher and mean estradiol concentrations between Days 3 and 5 were lower in 4-wave goats (P4: 3.8 +- 0.2 ng/ml; E2: 1.6 +- 0.2 pg/ml) than in 3-wave goats (P4: 2.0 +- 0.5 ng/ml, P <= 0.05; E2: 4.4 +- 0.9 Pg/ml, P <= 0.05). Wave 2 emerged earlier in 4-wave (Day 4.2 +- 0.3) than in 3-wave goats (Day 7.3 +- 0.3, P <= 0.05). Three out of six of the progesterone-treated goats had short cycles (mean 8.0 +- 0.0 days) and ovulated from Wave 1. The other three goats had shorter cycles (mean 18.3 +- 0.3 days) than the control group (20.0 +- 0.2 days; P <= 0.05), although they were within the normal range of control cycles (shortened cycles). ln the three treated goats with shortened cycles (two with four waves, one with three waves), mean progesterone concentrations betwe... Mostrar Tudo |
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Palavras-Chave: |
Dinâmica folicular; Ultrasom. |
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Thesagro: |
Caprino; Ciclo Estral; Endocrinologia; Progesterona; Reprodução Animal. |
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Categoria do assunto: |
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Marc: |
LEADER 02718naa a2200217 a 4500
001 1530635
005 2004-07-01
008 2002 bl uuuu u00u1 u #d
100 1 $aMENCHACA, A.
245 $aRelation between progesterone concentrations during the early luteal phase and follicular dynamics in goats.
260 $c2002
520 $aWe studied the relationship between progesterone (P 4) concentrations early in the estrus cycle and follicular dynamics in dairy goats. We used seven untreated goats (control group) and six progesterone treated goats (P group) with a controlled internaI drug release device from Days 0 to 5 (Day 0: day of ovulation). We performed daily ultrasonograph during the interovulatory interval to determine ovarian change and took daily blood samples to determine serum estradiol 17Betha (E2) and P4 concentrations by RIA. We divided the control goats into 3- (n = 4) and 4-wave goats (n = 3), according to the number of follicular waves recorded during the ovulatory cycle. Mean progesterone concentrations between Days 1 and 5 were higher and mean estradiol concentrations between Days 3 and 5 were lower in 4-wave goats (P4: 3.8 +- 0.2 ng/ml; E2: 1.6 +- 0.2 pg/ml) than in 3-wave goats (P4: 2.0 +- 0.5 ng/ml, P <= 0.05; E2: 4.4 +- 0.9 Pg/ml, P <= 0.05). Wave 2 emerged earlier in 4-wave (Day 4.2 +- 0.3) than in 3-wave goats (Day 7.3 +- 0.3, P <= 0.05). Three out of six of the progesterone-treated goats had short cycles (mean 8.0 +- 0.0 days) and ovulated from Wave 1. The other three goats had shorter cycles (mean 18.3 +- 0.3 days) than the control group (20.0 +- 0.2 days; P <= 0.05), although they were within the normal range of control cycles (shortened cycles). ln the three treated goats with shortened cycles (two with four waves, one with three waves), mean progesterone concentrations between Days 1 and 5 were higher (4.7 +- 0.6 ng/ml) than in the 3-wave control goats. ln these goats, Wave 2 emerged at Day 4.3 +- 0.3, similar to the time observed in 4-wave goats but earlier (P<= 0.05) than in 3-wave control goats. Overall results confirm a relationship between the progesterone levels and the follicular wave turnover during the early luteal phase in the goat. Higher progesterone concentrations may accelerate follicular turnover probably by an early decline of the negative feedback action of the largest follicle of Wave 1. This is followed by an early emergence of Wave 2.
650 $aCaprino
650 $aCiclo Estral
650 $aEndocrinologia
650 $aProgesterona
650 $aReprodução Animal
653 $aDinâmica folicular
653 $aUltrasom
700 1 $aRUBIANES, E.
773 $tTheriogenology$gv. 57, n. 5, p. 1411-1419, 2002.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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| Registros recuperados : 3 | |
| 1. |  | BRAGANÇA, G. M.; SOUZA-FABJAN, J. M. G.; BATISTA, R. I. T. P.; RIBEIRO, L. S.; BRAIR, V. L.; CÔRTES, L. R.; SOUZA, C. V.; TRAIRA, A. R.; FONSECA, J. F. da; MENCHACA, A.; BRANDÃO, F. Z. Different progestagens sources do not affect the follicular population and the morphological quality of oocytes during ovarian stimulation in Santa Inês ewes. Animal Reprodroduction, v. 15, n. 3, p. 451, Jul./Sept. 2018. Abstracts A151. Edição dos Proceedings of the 32nd Annual Meeting of the Brazilian Embryo Technology Society (SBTE); Florianópolis, SC, Brazil, August 16th to 18th, 2018.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| 2. | | BRAGANÇA, G. M.; SOUZA-FABJANA, J. M. G.; RIBEIRO, L. S.; BRAIRA, V. L.; CÔRTES, L. R.; SOUZA, C. V.; BATISTA, R. I. T. P.; FONSECA, J. F. da; MENCHACA, A.; BRANDÃO, F. Z. Exogenous progestogen does not affectfirst-wave folliclepopulations and oocyte quality during ovarian stimulationwith FSH in sheep. Domestic Animal Endocrinology, v. 72, e106369, Jul. 2020. Online ahead of print.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Caprinos e Ovinos. |
|  |
| 3. | | BRAGANÇA, G. M.; BATISTA, R. I. T. P.; SOUZA-FABJAN, J. M. G.; ALFRADIQUE, V. A. P.; ARASHIRO, E. K. N.; PINTO, P. H. N.; SANTOS, J. D. R.; CAMARGO, L. S. de A.; MENCHACA, A.; FONSECA, J. F. da; BRANDÃO, F. Z. Exogenous progestogens differentially alter gene expression of immature cumulus-oocyte complexes in sheep. Domestic Animal Endocrinology, v. 74, e106518, 2021.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Caprinos e Ovinos; Embrapa Gado de Leite. |
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| Registros recuperados : 3 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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