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OJVRTM
Online Journal of Veterinary Research©
Volume 10 (1):42-46, 2006. Redacted 2018.
Effect of progesterone
ear implant on reproductive parameters in cattle.
Shukla MK.
Instructional Dairy Farm, College of
Veterinary and Animal Science, G.B.Pant University of
Agriculture and Technology, Pantnagar, Udham Singh nagar, Uttaranchal,
India.
ABSTRACT
Shukla MK., Effect of
progesterone ear implant on reproductive parameters in cattle, Onl 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 untreated animals under similar
conditions were used as controls. Estrus was induced (83.33%) in treated cattle
compared with controls (0%) with a mean duration of 43.5±6.02h after implant.
The percentage of treated cattle not induced was 16.66% lower (P<0.01)
compared with controls (100 %). In animals with implant the service period of
108.5 ± 31 days was less (P < 0.01) compared with controls (183.5±38 days).
Although the implants induced and synchronized estrus, in crossbreds conception
(41.66 %) was not high possibly due to differences between artificial
insemination and natural estrus.
Key words:
Syncro-Mate B, norgestomet,
estradiol valerate, crossbred cattle