Optimizing estrous period characteristics of crossbred cows exhibiting prolonged estrus using a PGF2α analogue
Abstract views: 101 / PDF downloads: 61
https://doi.org/10.56093/ijans.v84i1.37292
Keywords:
Cow, Cloprostenol, Estrous period, Ovulation, Prolonged estrusAbstract
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 spontaneous- estrus. 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.
Downloads
References
Britt J H. 1992. Impacts of early postpartum metabolism on follicular development and fertility. Proceedings of the 24th Annual Convention of American Association of Bovine Practitioners 24: 39–43.
Dadarwal D, Singh Jagir, Honparkhe M, Cheede G S and Kang R S. 2005. Investigations on repeat breeding crossbred cattle with history of prolonged estrus. Indian Journal of Animal Sciences 75: 922–24.
Duchens M, Forsberg M, Edqvist L E, Gustafsson H and Rodriguez-Mertinez H. 1994. Effect of induced suprabasal progesterone levels around estrus on plasma concentrations of progesterone, estradiol-17ß and LH in heifers. Theriogenology 42: 1159–69.
Duchens M, Maciel M, Gustafsson H, Forsberg M, Rodriguez- Martinez H and Edqvist L E. 1995a. Influence of perioestrus suprabasal progesterone levels on cycle length, oestrus behaviour and ovulation in heifers. Animal reproduction Science 37: 95–108.
Duchens M, Forsberg M, Edqvist L E, Gustafsson H and Rodriguez- Mertinez H. 1995b. Reproductive performance of heifers induced to oestrous asynchrony by suprabasal plasma progesterone levels. Animal Reproduction Science 39: 171–82.
Dytham C. 1999. Choosing and Using Statistics, A Biologoist’s Guide. Vol. 2. Blackwell Science Press, London.
Ghuman S P S, Singh J, Honparkhe M, Dadarwal D, Dhaliwal G S and Jain A K. 2008. Induction of ovulation of ovulatory size nonovulatory follicles and initiation of ovarian cyclicity in summer anoestrous buffalo heifers (Bubalus bubalis) using melatonin implants Reproduction in Domestic Animals. doi: 10.1111/j.1439-0531.2008.01310.x: 1–8.
Honparkhe M, Singh J, Dadarwal D, Ghuman S P S, Dhaliwal G S and Kumar A. 2010. Midluteal phase GnRH treatment of repeat breeder cattle exhibiting prolonged estrus: effect on subsequent estrus, luteal profile and conception rate. Indian Veterinary Journal 88: 1.
Lyimo Z C, Nielen M, Ouweltjes W, Kruip T A M and van Eerdenburg F J C M. 2000. Relationship among estradiol, cortisol and intensity of estrous behavior in dairy cattle. Theriogenology 53:1783–95.
Singh J, Dadarwal D, Honparkhe M, Dhaliwal G S and Ghuman S P S. 2009. Prolonged estrus in repeat breeding cross-bred cows: incidence, hormonal profile and ovarian dynamics. Project report. ICAR, New Delhi, India.
Singh J, Honparkhe M, Ghuman S P S, Dadarwal D, Dhaliwal G S and Kumar A. 2010. Spontaneous and cloprostenol-induced corpus luteum regression in crossbred cattle with prolonged estrus. Indian Veterinary Journal 87: 3.
Vasconcelos J L M, Sartori R, Oliveira H N, Guenther J G and Wiltbank M C. 2001. Reduction in size of the ovulatory follicle reduces subsequent luteal size and pregnancy rate. Theriogenology 56: 307–14.
Van Eerdenburg F J C M, Karthaus D, Taverne M A M, Merics I and Szenci O. 2002. The relationship between estrous behavioral score and time of ovulation in dairy cattle. Journal of Dairy Science 85: 1150–56.
Wehrman M E, Roberson MS, Cupp A S, Kojima F N, Stumpf T T, Werth L A, Wolfe M W, Kittok R J and Kinder J E. 1993. Increasing exogenous progesterone during synchronization of oestrous decreases endogenous 17ß-estradiol and increases conception in cows. Biology of Reproduction 49:214–20.
Downloads
Submitted
Published
Issue
Section
License
Copyright (c) 2014 The Indian Journal of Animal Sciences
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
The copyright of the articles published in The Indian Journal of Animal Sciences is vested with the Indian Council of Agricultural Research, which reserves the right to enter into any agreement with any organization in India or abroad, for reprography, photocopying, storage and dissemination of information. The Council has no objection to using the material, provided the information is not being utilized for commercial purposes and wherever the information is being used, proper credit is given to ICAR.