Exploring the effects of second estrus synchronization and dietary flushing on the incidence of ovarian cysts in gilts by using exogenous gonadotropins
Estrus stimulation by exogenous gonadotropins (EG) in association with dietary flushing is an important tool for the improvement of gilt reproductive performance. However, there is evidence associating both flushing and EG with a disturbance in the endocrine balance that could lead to increased ovar...
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2013-08-01
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doaj-49a84b9f9e4e4e85b20a33969f51e51e2020-11-25T03:45:51ZengUniversidade de São PauloBrazilian Journal of Veterinary Research and Animal Science1413-95961678-44562013-08-0150410.11606/issn.2318-3659.v50i4p307-31572473Exploring the effects of second estrus synchronization and dietary flushing on the incidence of ovarian cysts in gilts by using exogenous gonadotropinsAline Campos RossetoDaniel Gonçalves BrunoSimone Maria Massami Kitamura MartinsVolnei do LagoMarcos Eduardo PineseWagner Loesch ViannaMaria Lucia Zaidan DagliFabiana Fernandes BressanAndré Furugen Cesar de AndradeGisele Mouro RavagnaniMariana Andrade TorresAníbal de Sant’Anna MorettiEstrus stimulation by exogenous gonadotropins (EG) in association with dietary flushing is an important tool for the improvement of gilt reproductive performance. However, there is evidence associating both flushing and EG with a disturbance in the endocrine balance that could lead to increased ovarian cysts. The aim of this study was to evaluate whether flushing or EG might affect the ovulation rate and the incidence of ovarian cysts. Seventy-one gilts were randomly distributed into 2x2 factorial design with four treatments: flushing and hormone (wFwH); no flushing and hormone (nFwH); flushing without hormone (wFnH); and neither flushing nor hormone (nFnH). Gilts were slaughtered for macroscopic and histopathological ovary examination approximately five days after AI. The characterization of these cysts was performed by optical microscopy in the following: follicular cysts (FC), luteinized cysts (LC) or cystic corpora lutea (CCL). The number of ovulations did not differ between treatments. There was no interaction between the factors in any analyzed variable. The frequency of gilts with CCL and LC was not affected by flushing and EG. No difference was found in the incidence of FC, with 12.5% and 5.88% in gilts from wFwH and nFwH treatments, respectively. There were no differences in the proportion of CCL between FC and LC (9.85 vs. 4.22 and 4.22%, respectively). In conclusion, the use of exogenous gonadotropins for second estrus synchronization in gilts, either alone or in association with dietary flushing, does not increase the incidence of ovarian cysts, nor does it decrease the ovulation rate.http://www.revistas.usp.br/bjvras/article/view/74724CystseCGFollicular atresiaLHSwine |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Aline Campos Rosseto Daniel Gonçalves Bruno Simone Maria Massami Kitamura Martins Volnei do Lago Marcos Eduardo Pinese Wagner Loesch Vianna Maria Lucia Zaidan Dagli Fabiana Fernandes Bressan André Furugen Cesar de Andrade Gisele Mouro Ravagnani Mariana Andrade Torres Aníbal de Sant’Anna Moretti |
spellingShingle |
Aline Campos Rosseto Daniel Gonçalves Bruno Simone Maria Massami Kitamura Martins Volnei do Lago Marcos Eduardo Pinese Wagner Loesch Vianna Maria Lucia Zaidan Dagli Fabiana Fernandes Bressan André Furugen Cesar de Andrade Gisele Mouro Ravagnani Mariana Andrade Torres Aníbal de Sant’Anna Moretti Exploring the effects of second estrus synchronization and dietary flushing on the incidence of ovarian cysts in gilts by using exogenous gonadotropins Brazilian Journal of Veterinary Research and Animal Science Cysts eCG Follicular atresia LH Swine |
author_facet |
Aline Campos Rosseto Daniel Gonçalves Bruno Simone Maria Massami Kitamura Martins Volnei do Lago Marcos Eduardo Pinese Wagner Loesch Vianna Maria Lucia Zaidan Dagli Fabiana Fernandes Bressan André Furugen Cesar de Andrade Gisele Mouro Ravagnani Mariana Andrade Torres Aníbal de Sant’Anna Moretti |
author_sort |
Aline Campos Rosseto |
title |
Exploring the effects of second estrus synchronization and dietary flushing on the incidence of ovarian cysts in gilts by using exogenous gonadotropins |
title_short |
Exploring the effects of second estrus synchronization and dietary flushing on the incidence of ovarian cysts in gilts by using exogenous gonadotropins |
title_full |
Exploring the effects of second estrus synchronization and dietary flushing on the incidence of ovarian cysts in gilts by using exogenous gonadotropins |
title_fullStr |
Exploring the effects of second estrus synchronization and dietary flushing on the incidence of ovarian cysts in gilts by using exogenous gonadotropins |
title_full_unstemmed |
Exploring the effects of second estrus synchronization and dietary flushing on the incidence of ovarian cysts in gilts by using exogenous gonadotropins |
title_sort |
exploring the effects of second estrus synchronization and dietary flushing on the incidence of ovarian cysts in gilts by using exogenous gonadotropins |
publisher |
Universidade de São Paulo |
series |
Brazilian Journal of Veterinary Research and Animal Science |
issn |
1413-9596 1678-4456 |
publishDate |
2013-08-01 |
description |
Estrus stimulation by exogenous gonadotropins (EG) in association with dietary flushing is an important tool for the improvement of gilt reproductive performance. However, there is evidence associating both flushing and EG with a disturbance in the endocrine balance that could lead to increased ovarian cysts. The aim of this study was to evaluate whether flushing or EG might affect the ovulation rate and the incidence of ovarian cysts. Seventy-one gilts were randomly distributed into 2x2 factorial design with four treatments: flushing and hormone (wFwH); no flushing and hormone (nFwH); flushing without hormone (wFnH); and neither flushing nor hormone (nFnH). Gilts were slaughtered for macroscopic and histopathological ovary examination approximately five days after AI. The characterization of these cysts was performed by optical microscopy in the following: follicular cysts (FC), luteinized cysts (LC) or cystic corpora lutea (CCL). The number of ovulations did not differ between treatments. There was no interaction between the factors in any analyzed variable. The frequency of gilts with CCL and LC was not affected by flushing and EG. No difference was found in the incidence of FC, with 12.5% and 5.88% in gilts from wFwH and nFwH treatments, respectively. There were no differences in the proportion of CCL between FC and LC (9.85 vs. 4.22 and 4.22%, respectively). In conclusion, the use of exogenous gonadotropins for second estrus synchronization in gilts, either alone or in association with dietary flushing, does not increase the incidence of ovarian cysts, nor does it decrease the ovulation rate. |
topic |
Cysts eCG Follicular atresia LH Swine |
url |
http://www.revistas.usp.br/bjvras/article/view/74724 |
work_keys_str_mv |
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