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Optimizing estrous period characteristics of crossbred cows exhibiting prolonged estrus using a PGF2α analogue

Indian Agricultural Research Journals

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Title Optimizing estrous period characteristics of crossbred cows exhibiting prolonged estrus using a PGF2α analogue
 
Creator GHUMAN, S P S
HONPARKHE, M
DADARWAL, D
SINGH, J
DHALIWAL, G S
 
Subject Cow, Cloprostenol, Estrous period, Ovulation, Prolonged estrus
 
Description The present study aimed at optimization of estrous period of prolonged estrus exhibiting crossbred cows (n=10) using PGF2α analogue (cloprostenol 500µg, i/m) administration between days 7 to 9 post-ovulation. Using a scoring chart, cows were scheduled for visual estrus detection, twice per day for 30 min. After each schedule, ultrasonography was done to detect the ovulation time. A scoring scale was used for the recording of visual estrus signs and estrus related alterations in the genital tract. During spontaneous-estrus (124.5±24h), ovulatory follicles had continuous growth before ovulation. During induced-estrus (32±3.5h), the maximum diameter of ovulatory follicle was similar to spontaneousestrus. The corpus luteum (CL) exhibited slow regression during spontaneous-estrus. The inconsistent estrous score recorded during the extended estrous period was normalized at induced-estrus. In summary, the slow ovulatory follicle growth and CL regression could be associated with the persistence of estrous characteristics, which were optimized following PGF2α administration during early-luteal phase of cows.
 
Publisher Directorate of Knowledge Management in Agriculture
 
Contributor —
 
Date 2014-01-30
 
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/37292
 
Source The Indian Journal of Animal Sciences; Vol 84, No 1 (2014)
0367-8318
 
Language eng
 
Relation http://epubs.icar.org.in/ejournal/index.php/IJAnS/article/view/37292/16675
 
Rights Copyright (c) 2014 The Indian Journal of Animal Sciences