Porcine luteinising hormone given at oestrus onset by intramuscularroute does not advance ovulation in gilts

Ciência Rural

Rafael Da Rosa Ulguim¹  Pedro Ernesto Sbardella¹  Diogo Luiz Fontana¹  Julia Linck Moroni¹  Luiza Pommerehn¹  Mari Lourdes Bernardi¹  Ivo Wentz¹  Fernando Pandolfo Bortolozzo¹ 

关键词: ovulation induction;    swine reproduction;    reproductive biotechniques.;    indução da ovulação;    reprodução suína;    biotécnicas reprodutivas.;   

DOI  :  10.1590/0103-8478cr20141759

来源: SciELO

【 摘 要 】

This study aimed to evaluate the use of porcine luteinising hormone (pLH) given at oestrus onset in gilts to synchronise ovulation. A total of 120 gilts (40/treatment) were assigned in three treatments: control - application of placebo by intramuscular (i.m.) route at oestrus onset; pLH2.5 - application of 2.5mg of pLH by i.m. route at oestrus onset; pLH5 - application of 5mg of pLH by i.m. route at oestrus onset. On average, the interval onset of oestrus to ovulation did not differ (P>0.05) among treatments (control - 28.7±1.6h; pLH2.5 - 28.2±1.6h; pLH5 - 27.5±1.6h). The frequency distribution of gilts ovulated in different moments after oestrus detection was not affected (P>0.05) by the treatment. In conclusion, the use of 2.5mg or 5mg of pLH given at oestrus onset in gilts by i.m. route does not advance and synchronises the interval onset of oestrus to ovulation.

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