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A CIDR-based AI protocol establishes pregnancy in repeat-breeder dairy cattle

Indian Agricultural Research Journals

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Title A CIDR-based AI protocol establishes pregnancy in repeat-breeder dairy cattle
 
Creator HONPARKHE, M
GHUMAN, S P S
SINGH, JAGIR
DHALIWAL, G S
 
Subject Cattle; CIDR; GnRH; Pregnancy; Repeat-breeder
 
Description The objectives of this study were to document ovarian and endocrine responses as well as pregnancy establishment following the treatment of repeat-breeder crossbred dairy cattle with a progesterone-releasing controlled internal drug release (CIDR) -based artificial insemination (AI) protocol. Cattle (25) received prostaglandin F2a (PGF2a , 500μg) on day 0, concurrent with the intravaginal placement of CIDR (1.38 g progesterone) for 15 days, followed by gonadotropin releasing hormone (GnRH) analogue (20μg) administration at the spontaneous onset of estrus (day 17, 18 or 19). About 10 h after GnRH, AI was carried out in all the cattle. On day 0, a corpus luteum (CL, 13.7±1.4 mm) and a large follicle (11.1±0.6 mm) were detectable in all the cattle. On day 15, the former was regressed (P
 
Publisher Directorate of Knowledge Management in Agriculture
 
Contributor —
 
Date 2011-04-07
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
—
 
Format application/pdf
 
Identifier http://epubs.icar.org.in/ejournal/index.php/IJAnS/article/view/5508
 
Source The Indian Journal of Animal Sciences; Vol 81, No 4 (2011)
0367-8318
 
Language eng
 
Relation http://epubs.icar.org.in/ejournal/index.php/IJAnS/article/view/5508/2288
 
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