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

作者：Ulguim Rafael da Rosa; Sbardella Pedro Ernesto; Fontana Diogo Luiz; Moroni Julia Linck; Pommerehn Luiza; Bernardi Mari Lourdes; Wentz Ivo; Bortolozzo Fernando Pandolfo^*

来源：Ciencia Rural, 2015, 45(10): 1887-1889.

DOI：10.1590/0103-8478cr20141759

• ovulation induction
• swine reproduction
• reproductive biotechniques

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 2.5 mg of pLH by i.m. route at oestrus onset; pLH5 - application of 5 mg 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 2.5 mg or 5 mg of pLH given at oestrus onset in gilts by i.m. route does not advance and synchronises the interval onset of oestrus to ovulation.

• 出版日期2015-10