Please use this identifier to cite or link to this item:
Title: Ovulation and oestrus synchronization using fluorogestone acetate vaginal sponges in nulliprous serrana goats por
Authors: Valentim, Ramiro
Azevedo, Jorge Manuel Teixeira de
Almeida, José Carlos
Correia, Teresa Montenegro
Mascarenhas, Ramiro
Fontes, Paulo J.
Simões, João
Issue Date: 2006
Publisher: Blackwell Verlag
Abstract: In order to determine the precise time of induced ovulation and oestrus after progestagen treatment in nulliparous Serrana goats, nine females aged between 2 and 3 years were used. In May, an intravaginal sponge impregnated with 45mg of fluorogestone acetate was inserted for 12 days with the injection (i.M.) of 500UI of eCG and 50 µg of cloprostenol at sponge removal time. Oestrus was detected using a vasectomized buck. Blood samples were collected from the jujular vein of each goat every 4h, during the first 24h after the onset of oestrus for LH determination. A transrectal ultrasond scanning of both ovaries was also performed every 4h, from onset of oestrus to 44h later. Ovulation was detected by disappearance of the large follicles.Corpora lutea (CL) were counted by ultrasonographic observation, 7-10 days after ovulation. The onset of oestrus was identified 33,4± 2.7 h (mean ± SD; n=9 after sponge removal. The interval between sponge removal and preovulatory LH peak was 37.0 ±3.6 h with a minimum of 51.3 and a maximum of 62.3 h The interval between preovulatory LH peak and ovulation was 20.0 ± 3.1 h. The number of CL observed per goat was 3.3 ± 0.7. In conclusion, after this progestagen treatment, a low variation of the time of ovulation was found. The great number of CL suggest a small dose of eCG could be used in nulliprous Serrana goats during seasonal anoestrus.
Peer Reviewed: yes
ISSN: 0936 - 6768
Document Type: Other
Appears in Collections:OLD - DZOO - Resumo de Comunicação em Conferência Internacional

Files in This Item:
File Description SizeFormat 
Rep Dom ani 2006.pdf666,13 kBAdobe PDFThumbnail

FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex mendeley Endnote Logotipo do DeGóis Logotipo do Orcid 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.