Data/hora: 14/06/2024 12:02:05

Biblioteca(s): | Embrapa Caprinos e Ovinos.
Data corrente: | 06/04/2021
Data da última atualização: | 07/04/2021
Autoria: | ANDRADE, A. B. P. de; MORAIS, M. C. C.; RANGELM P. S. C.; OLIVEIRA, M. E. F.; SOUZA-FABJAN, J. M. G.; FONSECA, J. F. da.
Afiliação: | AMANDA BRICIO PEREIRA DE ANDRADE, Universidade Federal Fluminense (UFF) - Niterói, RJ, Brazil; MARIA CLARA CRUZ MORAIS, Universidade Federal Fluminense (UFF) - Niterói, RJ, Brazil; PAULO SERGIO CERQUEIRA RANGEL, Universidade do Grande Rio ( Unigranrio) - Duque de Caxias, RJ, Brazil; MARIA EMILIA FRANCO OLIVEIRA, Universidade Estadual Paulista (Unesp) - Jaboticabal, SP, Brazil; JOANNA MARIA GONÇALVES SOUZA-FABJAN, Universidade Federal Fluminense (UFF) - Niterói, RJ, Brazil; JEFERSON FERREIRA DA FONSECA, CNPC.
Título: | Effect of eCG in a short-term synchronization treatment on ovarian status, estrus synchrony, and ovulation in dairy goats managed under tropical conditions.
Ano de publicação: | 2021
Fonte/Imprenta: | Tropical Animal Health and Production, v. 53, n. 246, 2021.
DOI: | https://doi.org/10.1007/s11250-021-02699-y
Idioma: | Inglês
Conteúdo: | Abstract: The aim of this study was to assess the need of using eCG on short-term estrus synchronization protocol in nulliparous (NUL) and multiparous (MULT) dairy goats during the breeding season. Alpine (n = 20), Nubian (n = 20), and Saanen (n = 16) goats received 60 mg medroxyprogesterone acetate intravaginal sponges for 6 days plus 30 ?g d-cloprostenol and 200 IU eCG (G-eCG, n = 28) or saline (G-Control, n = 28) 24 h before sponge removal. The NUL and MULT goats of each breed were equally assigned into the two treatments. Transrectal ultrasonography was used to evaluate ovulatory parameters, and teaser goats were used for estrus detection every 12 h from sponge removal to ovulation. eCG did not affect (P > 0.05) estrus response (~86%), diameter of ovulatory follicles (~6.8 mm), and number of ovulations (~1.6). Nevertheless, eCG led to earlier (P < 0.05) ovulation (G-eCG = 65.1 and G-Control = 73.2 h) and increased (P < 0.05) the ovulation rate (G-eCG = 96.4% and G-Control = 67.9%). In the absence of eCG, no differences regarding reproductive parameters (P > 0.05) were found between parity orders. Alpine MULT goats underwent a superior (P < 0.05) number of ovulations (2.2) in comparison to NUL goats (1.3). In conclusion, the exclusion of eCG from short-term estrus synchronization protocol did not interfere with estrus response but decreased the ovulation rate.
Palavras-Chave: | Gonadotropin; Multiparous; Nulliparous; Oestrous cycle; Oestrus synchronization; Synchronized females; Taxa de ovulação.
Thesagro: | Cabra Leiteira; Caprino; Gonadotrofina; Reprodução; Sincronização do Cio.
Thesaurus Nal: | Brazil; Does (females); Equine chorionic gonadotropin; Estrus synchronization; Female fertility; Gonadotropins; Hormones; Ovulation; Reproduction; Small ruminants.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
Registro original: | Embrapa Caprinos e Ovinos (CNPC)
Exemplares: | CNPC - (39752-1) - UPC - AP - DD -  -  -  - DIS