The effect of gonadotropin-releasing hormone or human chorionic gonadotropin administration at mating on lambing performance in konya merino yearling ewes
<b>Aim:</b> In this study, it was aimed to determine the effects of the exogenous gonadotropin-releasing hormone (GnRH) or human chorionic gonadotropin (hCG) application at mating on lambing performance in synchronization and following cycle in Konya Merino yearling ewes.<p> <b&...
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Selcuk University Press
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| Series: | Eurasian Journal of Veterinary Sciences |
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| Online Access: | http://eurasianjvetsci.org/pdf.php3?id=884 |
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| author | Mehmet Köse Ahmet Hamdi Aktaş Mesut Kırbaş Bülent Bülbül |
| author_facet | Mehmet Köse Ahmet Hamdi Aktaş Mesut Kırbaş Bülent Bülbül |
| author_sort | Mehmet Köse |
| collection | DOAJ |
| description | <b>Aim:</b> In this study, it was aimed to determine the effects of
the exogenous gonadotropin-releasing hormone (GnRH) or
human chorionic gonadotropin (hCG) application at mating
on lambing performance in synchronization and following
cycle in Konya Merino yearling ewes.<p>
<b>Materials and Methods:</b> Thirty six yearling Merino ewes,
aging 16-20 months, were used as material. Estrus of
ewes was synchronized with 4 μg GnRH on d 0 and 150
μg prostaglandinF2α (PGF2α) on day 5, intramuscularly. After
PGF2α injection, the ewes detected to be in estrus were
mated with a ram, whose fertility was known previously,
and they were divided into three groups. Group I (n=14)
were injected 200 IU hCG, Group II (n=12) were injected 4
μg GnRH, and Group III (control group, n=10) were injected
1 mL placebo at mating. Pregnancy was diagnosed on day
30 by using transrectal ultrasonography.<p>
<b>Results:</b> In the present study, pregnancy, birth, twinning
rate and lambing performance were 85.71%, 85.71%,
33.3% and 1.14 in hCG group, 75.0%, 66.67%, 12.5%, and
0.75 in GnRH group, and 100%, 80%, 37.5% and 1.10 in
control group, respectively. There was no significant difference
among groups for lambing performance and studied
reproductive parameters (p>0.05).<p>
<b>Conclusion:</b> In conclusion, the injection of GnRH or hCG in
Merino ewes at mating was not effective on lambing performance. |
| format | Article |
| id | doaj-art-08edd2dc6d3e435191c11ebab0b187c5 |
| institution | Kabale University |
| issn | 1309-6958 2146-1953 |
| language | English |
| publisher | Selcuk University Press |
| record_format | Article |
| series | Eurasian Journal of Veterinary Sciences |
| spelling | doaj-art-08edd2dc6d3e435191c11ebab0b187c52025-02-03T11:25:41ZengSelcuk University PressEurasian Journal of Veterinary Sciences1309-69582146-1953283149153884The effect of gonadotropin-releasing hormone or human chorionic gonadotropin administration at mating on lambing performance in konya merino yearling ewesMehmet Köse01Ahmet Hamdi Aktaş2Mesut Kırbaş3Bülent Bülbül4Dicle Üniversitesi, Veteriner Fakültesi, Doğum ve Jinekoloji Anabilim Dalı, Diyarbakır, TürkiyeBahri Dağdaş Uluslararası Tarımsal Araştırma Enstitüsü, Konya, TürkiyeBahri Dağdaş Uluslararası Tarımsal Araştırma Enstitüsü, Konya, TürkiyeBahri Dağdaş Uluslararası Tarımsal Araştırma Enstitüsü, Konya, TürkiyeBahri Dağdaş Uluslararası Tarımsal Araştırma Enstitüsü, Konya, Türkiye<b>Aim:</b> In this study, it was aimed to determine the effects of the exogenous gonadotropin-releasing hormone (GnRH) or human chorionic gonadotropin (hCG) application at mating on lambing performance in synchronization and following cycle in Konya Merino yearling ewes.<p> <b>Materials and Methods:</b> Thirty six yearling Merino ewes, aging 16-20 months, were used as material. Estrus of ewes was synchronized with 4 μg GnRH on d 0 and 150 μg prostaglandinF2α (PGF2α) on day 5, intramuscularly. After PGF2α injection, the ewes detected to be in estrus were mated with a ram, whose fertility was known previously, and they were divided into three groups. Group I (n=14) were injected 200 IU hCG, Group II (n=12) were injected 4 μg GnRH, and Group III (control group, n=10) were injected 1 mL placebo at mating. Pregnancy was diagnosed on day 30 by using transrectal ultrasonography.<p> <b>Results:</b> In the present study, pregnancy, birth, twinning rate and lambing performance were 85.71%, 85.71%, 33.3% and 1.14 in hCG group, 75.0%, 66.67%, 12.5%, and 0.75 in GnRH group, and 100%, 80%, 37.5% and 1.10 in control group, respectively. There was no significant difference among groups for lambing performance and studied reproductive parameters (p>0.05).<p> <b>Conclusion:</b> In conclusion, the injection of GnRH or hCG in Merino ewes at mating was not effective on lambing performance.http://eurasianjvetsci.org/pdf.php3?id=884konya merinoyearling ewesgnrhhcglambing performance |
| spellingShingle | Mehmet Köse Ahmet Hamdi Aktaş Mesut Kırbaş Bülent Bülbül The effect of gonadotropin-releasing hormone or human chorionic gonadotropin administration at mating on lambing performance in konya merino yearling ewes Eurasian Journal of Veterinary Sciences konya merino yearling ewes gnrh hcg lambing performance |
| title | The effect of gonadotropin-releasing hormone or human chorionic gonadotropin administration at mating on lambing performance in konya merino yearling ewes |
| title_full | The effect of gonadotropin-releasing hormone or human chorionic gonadotropin administration at mating on lambing performance in konya merino yearling ewes |
| title_fullStr | The effect of gonadotropin-releasing hormone or human chorionic gonadotropin administration at mating on lambing performance in konya merino yearling ewes |
| title_full_unstemmed | The effect of gonadotropin-releasing hormone or human chorionic gonadotropin administration at mating on lambing performance in konya merino yearling ewes |
| title_short | The effect of gonadotropin-releasing hormone or human chorionic gonadotropin administration at mating on lambing performance in konya merino yearling ewes |
| title_sort | effect of gonadotropin releasing hormone or human chorionic gonadotropin administration at mating on lambing performance in konya merino yearling ewes |
| topic | konya merino yearling ewes gnrh hcg lambing performance |
| url | http://eurasianjvetsci.org/pdf.php3?id=884 |
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