Original Scientific Article
Estrus responses and hormonal profiles of gilts following treatments with Prostaglandin F2α
Yusuf Abdulrasheed Alimi * ,
Oluwafisayo Oluwadamilare Leigh ,
Oluwatoyin Oluwasola Ajala ,
John Olusoji Abiola

Mac Vet Rev 2017; 40 (1): 13 - 20

10.1515/macvetrev-2016-0092

Received: 01 April 2016

Received in revised form: 15 August 2016

Accepted: 28 September 2016

Available Online First: 04 November 2016

Published on: 15 March 2017

Correspondence: Yusuf Abdulrasheed Alimi, abdulrasheedyusuf@yahoo.com
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Abstract

This study investigated the effect of three intramuscular injections of Prostaglandin F2α (PGF2α) administered seven days apart on estrus responses and some reproductive hormonal profiles in post-pubertal gilts.Sixteen gilts were divided into groups A, B, C, and D, with four animals in each group. Group A, B and C gilts were treated with PGF2α injections intramuscularly at doses 5mg,7.5mg and 10mg per gilt respectively on Days 0, 6 and 13 of the experiment. Group D (Control) were treated with intramuscular injections of 2ml phosphate-buffered saline (PBS) instead. Serum samples were collected every 24 hours for four days after each PGF2α injection and estrus detection was conducted daily. Results showed that 100% of Group A came into estrus 96 hours after the second PGF2α injection,while 50% of Group B came into estrus after the first injection; with the other 50% exhibiting estrus following the 2nd injection. Only 50% of Group C displayed estrus signs and this was observed following the second PGF2α injection. Control gilts did not express behavioral estrus during this study, suggesting that PGF2α may have induced estrus in the treated animals. LH and estradiol concentrations were significantly different in Group A and B when compared to the control following the 2nd PGF2α injection. In all, it was observed that serum concentrations of LH, FSH and oestradiol-17β reached maximal levels just prior to expression of estrus, thus suggesting that the pattern of reproductive hormonal changes in PGF2α-synchronized gilts may be quite similar to those of naturally cycling in-estrus gilts.

Keywords: estrus responses, hormones, gilts, PGF2α

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Copyright

© 2016 Alimi Y.A. This is an open-access article publishedunder the terms of the Creative Commons Attribution License whichpermits unrestricted use, distribution, and reproduction in any medium,provided the original author and source are credited

Conflict of Interest Statement

The authors declared that they have no potential conflict of interest with respect to the authorship and/or publication of this article.

Citation Information

Macedonian Veterinary Review. Volume 40, Issue 1, Pages 13-20, p-ISSN 1409-7621, e-ISSN 1857-7415, DOI: 10.1515/macvetrev-2016-0092, 2017

The all content of the Macedonian Veterinary Review, except where otherwise noted, is licensed under a Creative Commons Attribution License.