Data/hora: 09/06/2024 01:33:25

Biblioteca(s): | Embrapa Caprinos e Ovinos.
Data corrente: | 18/07/2017
Data da última atualização: | 18/07/2017
Autoria: | FUKUI, Y.; TABUCHI, K.; YAMADA, A.; HAYASHI, N.; TANAKA. K.
Título: | Effect of insertion periods of Controlled Internal Drug Release Device (CIDRR) on conception rate by fixed-time intrauterine insemination with frozen semen in seasonally anestrous ewes.
Ano de publicação: | 1994
Fonte/Imprenta: | Journal of Reproduction and Development, v. 40, n. 3, p. 221-226, Aug. 1994.
DOI: | http://doi.org/10.1262/jrd.40.221
Idioma: | Inglês
Conteúdo: | Conception rates and plasma hormonal patterns were investigated after treating ewes with CIDRR (controlled internal drug release device) for different lengths of time during the non-breeding season. In Experiment 1, 101 Suffolk ewes were treated with CIDRR for 6, 9, 12 days; pregnant mare's serum gonadotropin (PMSG) was injected the day before CIDRR removal. At 42 to 50 h after treatment, ewes were inseminated with frozen-thawed semen using a laparoscope. Lambing rates were not significantly different among the groups (66.7, 76.5 and 85.3% for 6, 9, and 12 days, respectively). Seven days after insemination, the re-insertion of CIDRR for 14 days (n=51) did not improve the pregnancy and lambing rates or prolificacy compared to the controls (n=50). In Experiment 2, the mean plasma progesterone concentration on the day of CIDRR removal in Booroola-Dorset ewes treated for 12 days was significantly (P<0.01) lower than those in ewes treated with CIDRR for 6 or 9 days. However, the onset of estrus after treatment was similar in ewes treated for different periods with CIDRR. These results indicate that a satisfactory lambing rate (67 to 85%) can be obtained with frozen semen in ewes treated with CIDRR, regardless of the insertion period (6 to 12 days) during the non-breeding season.
Palavras-Chave: | Drugs effects; Intrauterine insemination; Non-breeding season; Oocyte preservation.
Thesagro: | Sêmen.
Thesaurus Nal: | Drug therapy; Ewes; Pharmacology; Sheep.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
Registro original: | Embrapa Caprinos e Ovinos (CNPC)
Exemplares: | CNPC - (34314-1) - ADD - AP - PP -  -  -  - DIS