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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
IJCMAS is now DOI (CrossRef) registered Research Journal. The DOIs are assigned to all published IJCMAS Articles.
Index Copernicus ICI Journals Master List 2018 - IJCMAS--ICV 2018: 95.39 For more details click here
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2020)
[Effective from January 1, 2020]
For more details click here

ICV 2018: 95.39
Index Copernicus ICI Journals Master List 2018 - IJCMAS--ICV 2018: 95.39
For more details click here

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Original Research Articles

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2020.9(5): 2229-2237
DOI: https://doi.org/10.20546/ijcmas.2020.905.254


Behavioural Signs and Fertility Response Following Spontaneous and Ovsynch Induced Estrus in Sahiwal Cows
Amninder Singh, Narinder Singh*, Mrigank Honparkhe, Vijay Singh Malik and Prahlad Singh
Department of Veterinary Gynaecology and Obstetrics, GADVASU, Ludhiana, India
*Corresponding author
Abstract:

The study was designed to evaluate behavioural estrus signs and fertility response following spontaneous and Ovsynch induced estrus in Sahiwal cows. Group 1: (Spontaneous estrus group; n=20) cows were observed visually and ultrasonographically from a random day till occurrence of spontaneous estrus and ovulation. Group 2 (Ovsynch group; n=10) were administered with standard Ovsynch protocol (two GnRH 20µg on day 0 and 9 and PGF 500µg on day 7, i.m.) started at random day of estrous cycle to synchronize estrus and ovulation. In group 1, the estrus characteristics viz. cervico-vaginal mucus discharge, mounting, vulvar swelling, bellowing and frequent urination were observed in 70, 65, 30, 10 and 20 percent cows, respectively as compared to 70, 40, 20, 30 and 20 per cent in group 2. In ovsynch group, higher size of dominant follicle (7 to 10 mm) at time of prostaglandin injection favoured subsequent ovulation, whereas, cows having smaller dominant follicle (< 7 mm size) failed to undergo ovulation. Similarly, average diameter of DFs on Day 10 was higher in cows showing ovulatory estrus as compared to non ovulatory cows in the Ovsynch group (11.9±0.27 vs. 9.25±1.18, respectively, P<0.05). Results suggested that CVM discharge and mounting activity were the two prominent signs expressed during estrus and efficacy of Ovsynch protocol initiated at random day of estrous cycle was lower in inducing ovulatory estrus and pregnancy in comparison to spontaneous estrus in Sahiwal cows.


Keywords: Estrus, Ovsynch, Ovulation, Pregnancy, Sahiwal
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How to cite this article:

Amninder Singh, Narinder Singh, Mrigank Honparkhe, Vijay Singh Malik and Prahlad Singh. 2020. Behavioural signs and fertility response following spontaneous and Ovsynch induced estrus in Sahiwal cows.Int.J.Curr.Microbiol.App.Sci. 9(5): 2229-2237. doi: https://doi.org/10.20546/ijcmas.2020.905.254