Data/hora: 05/06/2024 16:16:36

Biblioteca(s): | Embrapa Caprinos e Ovinos.
Data corrente: | 25/08/2014
Data da última atualização: | 15/04/2016
Autoria: | SOUZA-FABJAN, J. M. G.; TORRES, C. A. A.; MAIA, A. L. R. S.; BRANDÃO, F. Z.; OBA, E.; BELTOLDO, M. J.; FONSECA, J. F. da.
Afiliação: | State University of Ceará (UECe) - Fortaleza-CE, Brazil; Viçosa Federal University (UFV) - Viçosa, MG, Brazil.; A. L. R. S. Maia, Fluminense Federal University - Niterói, RJ, Brazil.; Fluminense Federal University - Niterói, RJ, Brazil.; São Paulo State University (USP) - Botucatu, SP, Brazil.; University of Sydney - Camden, Australia; Jeferson Ferreira da Fonseca, CNPC.
Título: | Re-used progesterone devices efficiently synchronise oestrus and ovulation after autoclaving process in Toggenburg goats during the breeding season.
Ano de publicação: | 2015
Fonte/Imprenta: | Animal Production Science, Victoria, v. 55, n. 6, p. 818-822, 2015.
DOI: | http://dx.doi.org/10.1071/AN14056
Idioma: | Inglês
Conteúdo: | Abstract: This study compared new and previously used (and autoclaved) progesterone devices for synchronisation of oestrus during the breeding season in Toggenburg goats. Nulliparous (n = 17) or lactating (n = 50) received new intravaginal devices containing 0.3 g progesterone (CONTROL), or similar devices previously used for either 6 (USED6) or 12 (USED12) days and subsequently autoclaved. All goats received 5 mg dinoprost at device insertion and 200 IU equine chorionic gonadotropin 5 days later and all devices were removed after 6 days. After device removal, females were mated by fertile bucks. Ovarian ultrasonography was performed every 12 h after device removal until ovulation detection. Blood samples were collected for determination of plasma progesterone concentration in different moments and intervals (from 7 days before device insertion to 3 days after its removal). There was no difference (P > 0.05) among groups CONTROL, USED6 or USED12 for: oestrus response [75% (18/24), 77% (17/22) or 71% (15/21), respectively]; duration of oestrus (30.7 ± 3.4, 31.8 ± 1.7 or 32.8 ± 3.4 h), percentage of ovulating goats [67% (6/9), 78% (7/9) or 56% (5/9)], ovulation rate (1.3 ± 0.2, 1.4 ± 0.2 or 1.8 ± 0.4 units of corpora lutea), average follicle diameter (6.2 ± 0.1, 6.7 ± 0.1 or 6.8 ± 0.3 mm) and pregnancy rate [54% (13/24), 50% (11/22) or 48% (10/21)]. Plasma progesterone concentrations were not different (P > 0.05) for does among treatments and between nulliparous and lactating females. In conclusion, autoclaved, previously used intravaginal progesterone devices are effective in synchronising oestrus and ovulation in cyclic goats during the breeding season.
Palavras-Chave: | Autoclavagem; CIDR; CIDR autoclavado; Dinâmica folicular; Dispositivos vaginais; Folículo; Oestrous cycle; Oestrus synchronization; Ovarian follicular dynamics; Ovaries; Raça Toggenburg; Sincronização do estro.
Thesagro: | Cabra; Caprino; Ciclo estral; Ovário; Ovulação; Progesterona; Reprodução animal; Sincronização do cio.
Thesaurus Nal: | Animal reproduction; Autoclaving; Goats; Ovulation; Progesterone.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
Registro original: | Embrapa Caprinos e Ovinos (CNPC)
Exemplares: | CNPC - (28158-1) - UPC - AP - DD -  -  -  - DIS