Administration of exogenous hormones in ovulatory and embryonic response in Pelibuey sheep

作者：Garcia Salas A; Cortez Romero C^*; Salazar Ortiz J; Arroyo Ledezma J; Ruiz Vera V M; Vaquera Huerta H; Gallegos Sanchez J

来源：Reproduction in Domestic Animals, 2017, 52(3): 446-451.

DOI：10.1111/rda.12930

• gonadotropins
• super-ovulation
• embryos
• Pelibuey sheep

Contents The objective of this study was to evaluate the effect of two sources of commercial porcine pituitary-derived follicle-stimulating hormone (pFSH) and pFSHporcine Luteinizing Hormone (pLH), including equine chorionic gonadotropin (eCG), in ovulatory and embryonic response in Pelibuey sheep. Twenty-four Pelibuey sheep were used and were assigned randomly to four treatments (n=6): (T1; 200mg pFSH-Folltropin((R))); (T2; 200mg pFSH + 300 UI eCG-Folligon((R))); (T3; 250 UI pFSH/pLH-Pluset((R))) and (T4; 250 UI pFSH/pLH + 300 UI eCG). The interval of hours from withdrawal of the device to the beginning of oestrus (BO) was lower (p<.05) in sheep treated with eCG (T2=8.0 +/- 1.4 and T4=10.0 +/- 2.8) than in those without eCG (T1=12.6 +/- 0.6 and T3=20.6 +/- 2.4). The ovulatory rate (OR) was higher (p<.05) in T1=15.5 +/- 2.8 and T2=15.6 +/- 1.4, compared to T3=8.1 +/- 3.2 and T4=11.8 +/- 2.8; a significant difference was not shown between them (T1 vs. T2 and T3 vs. T4) when including eCG. The number of non-fertilized oocytes (NFO) was lower (p?.05) in T1=0.8 +/- 0.4 and T3=1.8 +/- 1.8, compared to those that included eCG (T2=6.3 +/- 2.4 and T4=2.1 +/- 1.2). The number of transferable embryos (TE) was higher (p<.05) when FSH was applied (T1=5.8 +/- 1.1), compared with (T2=2.6 +/- 1.1, T3=2.3 +/- 1.4 and T4=2.8 +/- 1.5). The commercial treatments (pFSH or pFSH-pLH) in combination with eCG did not improve OR, NFO and TE. However, the exclusive pFSH (Folltropin) treatment presented a higher OR, lower number of NFO and higher number of TE.

• 出版日期2017-6