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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
09/04/2010 |
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Data da última atualização: |
14/01/2025 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
FONSECA, J. F. da; TORRES, C. A. A. |
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Afiliação: |
JEFERSON FERREIRA DA FONSECA, CNPC; UNIVERSIDADE FEDERAL DE VIÇOSA. |
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Título: |
Administration of hCG 5 days after breeding and reproductive performance in nulliparous dairy goats. |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
Reproduction in Domestic Animals, v. 40, n. 6, p. 495-499, 2005. |
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DOI: |
10.1111/j.1439-0531.2005.00612.x |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: The objective of this study was to investigate the effect of hCG administration 5 days after breeding on plasma progesterone (P4) concentration and reproductive performance of oestrousinduced nulliparous dairy goats. A total of 59 nulliparous goats (36 Alpine and 23 Saanen) received intravaginal sponges with 60 mg medroxyprogesterone acetate for 9 days plus 200 IU equine chorionic gonadotrophin (eCG) and 22.5 lg d-cloprostenol 24 h before sponge removal. After detection of oestrus (day of oestrus ¼ day 0) and breeding, 49 females were randomly assigned, according to the breed, into two treatments (T1 and T2). In T1 (n ¼ 25) and T2 (n ¼ 24), animals received intramuscular injection of 1 ml of saline solution (control) or 250 IU hCG, respectively, 5 days after breeding. Plasma P4 concentration (ng/ml) was determined from blood sampled on days 0, 5, 7, 13, 17, 21, 28 and 45 after breeding. Animals were scanned by transrectal ultrasound (5 MHz probe) on days 35 and 70 after breeding for detection of pregnancy. Plasma P4 concentration did not differ (p > 0.05) between treatments in all days, but it was increased (p < 0.05) in Saanen than in Alpine goats from days 13 to 45. Pregnancy and parturition rates, litter size and gestation period were similar (p > 0.05) to treatments and breeds. Results of this study indicate that human chorionic gonadotrophin (hCG) administration 5 days after breeding did not significantly alter reproductive performance in dairy nulliparous goats and that plasma P4 differed between Saanen and Alpine goats. MenosAbstract: The objective of this study was to investigate the effect of hCG administration 5 days after breeding on plasma progesterone (P4) concentration and reproductive performance of oestrousinduced nulliparous dairy goats. A total of 59 nulliparous goats (36 Alpine and 23 Saanen) received intravaginal sponges with 60 mg medroxyprogesterone acetate for 9 days plus 200 IU equine chorionic gonadotrophin (eCG) and 22.5 lg d-cloprostenol 24 h before sponge removal. After detection of oestrus (day of oestrus ¼ day 0) and breeding, 49 females were randomly assigned, according to the breed, into two treatments (T1 and T2). In T1 (n ¼ 25) and T2 (n ¼ 24), animals received intramuscular injection of 1 ml of saline solution (control) or 250 IU hCG, respectively, 5 days after breeding. Plasma P4 concentration (ng/ml) was determined from blood sampled on days 0, 5, 7, 13, 17, 21, 28 and 45 after breeding. Animals were scanned by transrectal ultrasound (5 MHz probe) on days 35 and 70 after breeding for detection of pregnancy. Plasma P4 concentration did not differ (p > 0.05) between treatments in all days, but it was increased (p < 0.05) in Saanen than in Alpine goats from days 13 to 45. Pregnancy and parturition rates, litter size and gestation period were similar (p > 0.05) to treatments and breeds. Results of this study indicate that human chorionic gonadotrophin (hCG) administration 5 days after breeding did not significantly alter reproductive performance in dairy nulliparous goa... Mostrar Tudo |
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Palavras-Chave: |
Brasil; Drug effects; Estro; Gonadotropin; HCG; Induction; Oestrous cycle; Parity; Plasma progesterone concentration; Progestagen; Time Factors. |
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Thesagro: |
Cabra; Ciclo estral; Eficiência reprodutiva; Endocrinologia; Indução; Progesterona; Reprodução animal. |
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Thesaurus Nal: |
Brazil; Corpus luteum; Estrous cycle; Estrus synchronization; Females; Goats; Litter size; Pharmacology; Physiology; Pregnancy rate; Progesterone; Reproduction. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
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Embrapa Caprinos e Ovinos (CNPC) |
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| 2. |  | FINKENAUER, D.; COMIOTTO, A.; MOURA, G. C.; MACHADO, N. P.; ANTUNES, L. E. C. Influência do horário de colheita nas condições físico-químicas de framboesas. In: CONGRESSO DE INICIAÇÃO CIENTIFICA, 18.; ENCONTRO DE PÓS GRADUAÇÃO, 11., E MOSTRA CIENTIFICA, 1., 2009, Pelotas. Anais... Pelotas: UFPel, 2009. 1 CD-ROM.| Tipo: Resumo em Anais de Congresso |
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