©1994-2009 All
Rights Reserved. Online
Journal of Veterinary Research. You may not store these
pages in any form except for your own personal use. All other usage or
distribution is illegal under international copyright treaties. Permission to
use any of these pages in any other way besides the before mentioned must be
gained in writing from the publisher. This article is
exclusively copyrighted in its entirety to OJVR publications. This article may
be copied once but may not be, reproduced or re-transmitted without the express
permission of the editors.
OJVRTM
Online Journal of Veterinary Research©
Volume 10
(1) : 42 -46, 2006
Effect of progesterone ear implant on reproductive
parameters in cattle
Shukla MK
1R&D-Biotechnology,
National Dairy Development Board, Anand-388001,
ABSTRACT
Shukla MK Effect of
progesterone ear implant on reproductive parameters in cattle, Online J Vet Res 10 (1):42-46, 2006.
An experiment was conducted to study
the effect of a norgestomet ear implant along with
intramuscular injection of norgestomet and estradiol valerate (Syncro-Mate B), on reproductive performance of a Bos taurus X Bos
indicus (HF X Sahiwal)
crossbred herd in sub Himalayan terrains of India. Post partum anestrous
animals with absence of ovarian activity were treated with Syncro-Mate
B ear implant and intramuscular injection of norgestomet
and estradiol valerate.
Equal numbers of animals in a similar condition were left untreated to act as
control. Remarkably higher per cent estrus induction in treatment (83.33 %) as
compared to no response in control group in a mean duration of 43.5±6.02 h from
implant withdrawal suggests efficacy of the implant in induction and
synchronization of estrus. The percent of animals not inducted to estrus in
treatment group (16.66 %) was significantly (P<0.01) lower than control (100
%). The service period of animals in the treatment group (108.5±31 days) was also
significantly reduced as compared to control (183.5±38 days). Though
significantly higher per cent of animals induced and synchronized to estrus
suggests efficacy of the treatment in crossbred herd, the conception rate
(41.66 %) was not very fascinating, which may be due to various factors which
interplay to determine success of AI at natural and induced estrus.
Key words: Syncro-Mate
B, norgestomet, estradiol valerate, crossbred cattle