Vet World Vol.17 May-2024 Article - 20
Research Article
Veterinary World, 17(5): 1119-1123
https://doi.org/10.14202/vetworld.2024.1119-1123
Comparative study of reproductive and estrus characteristics of sexed and conventional semen in crossbred cows under field conditions
Background and Aim: Sexed semen (SS), a reproductive biotechnology tool, can alter the sex ratio of offspring in bovines. This study elucidates a comparative analysis of estrus-related parameters influencing conception rate and pregnancy losses under field conditions between conventional and SS.
Materials and Methods: In the present study, artificial insemination with (SS; n = 143) and conventional semen (CS; n = 143) was performed at spontaneous estrus, i.e., 16–18 h after the onset of estrus signs, to analyze their comparative evaluation in terms of conception rates in crossbred cows under field conditions. Different parameters such as age, parity, body condition score (BCS), estrus duration, inter-estrus interval (IEI), diameter of pre-ovulatory follicle (DPOF) at estrus, and cervical mucus properties (pH and spinnbarkeit [SBK]) were recorded for each cow.
Results: The first insemination conception rates for sexed and conventional semen were 55.24% and 63.63% whereas the overall conception rates were 49.14% and 57.37% on days 35 and 75 post-insemination, respectively, with no significant difference (p > 0.05). Conception rates between sexed and CS inseminations were statistically significant (p < 0.01), whereas factors such as age, parity, BCS, DPOF, IEI, and SBK value exhibited no substantial variance (p > 0.05) for both types of semen straw.
Conclusion: SS straws yielded a conception rate equivalent to CS straws, with estrus duration being the key factor affecting conception under field conditions.
Keywords: conception rate, crossbred cows, estrus duration, pregnancy losses, sexed semen.
How to cite this article: Sharma A, Sood P, Kumar P, Sharma P, Ahuja AK, Negi V, Kumar H, and Sharma AK (2024) Comparative study of reproductive and estrus characteristics of sexed and conventional semen in crossbred cows under field conditions, Veterinary World, 17(5): 1119–1123.
Received: 2024-02-21 Accepted: 2024-04-25 Published online: 2024-05-17
Corresponding author: E-mail:
DOI: 10.14202/vetworld.2024.1119-1123
Copyright: Sharma, et al. This article is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/ by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http:// creativecommons.org/ publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
