Administration of exogenous hormones in ovulatory and embryonic response in Pelibuey sheep.
The objective of this study was to evaluate the effect of two sources of commercial porcine pituitary-derived follicle-stimulating hormone (pFSH) and pFSH-porcine 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; 200 mg pFSH-Folltropin®); (T2; 200 mg pFSH + 300 UI eCG-Folligon®); (T3; 250 UI pFSH/pLH-Pluset®) 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.
Genetic Resources and Productivity - Livestock, Colegio de Postgraduados, Montecillo, Texcoco, Estado de México, Mexico.
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García-Salas
Genetic Resources and Productivity - Livestock, Colegio de Postgraduados, Montecillo, Texcoco, Estado de México, Mexico.|Innovation in Natural Resource Management, Colegio de Postgraduados, Salinas de Hidalgo, San Luis Potosi, Mexico.|Priority Research Line No. 5 (LPI-5: Microbial, Plant and Animal Biotechnology) at Colegio de Postgraduados, Salinas de Hidalgo, San Luis Potosí, Mexico.
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Cortez-Romero
Priority Research Line No. 5 (LPI-5: Microbial, Plant and Animal Biotechnology) at Colegio de Postgraduados, Salinas de Hidalgo, San Luis Potosí, Mexico.|Sustainable Agro-Food Innovation, Colegio de Postgraduados, Córdoba, Veracruz, Mexico.
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Salazar-Ortiz
Agricultural Sciences, Ciudad Universitaria, Universidad del Mar, Puerto Escondido, Oaxaca, México.
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Arroyo-Ledezma
Innovation in Natural Resource Management, Colegio de Postgraduados, Salinas de Hidalgo, San Luis Potosi, Mexico.
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Ruíz-Vera
Statistical Program, Colegio de Postgraduados, Montecillo, Texcoco, Estado de México, México.
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Vaquera-Huerta
Genetic Resources and Productivity - Livestock, Colegio de Postgraduados, Montecillo, Texcoco, Estado de México, Mexico.|Priority Research Line No. 5 (LPI-5: Microbial, Plant and Animal Biotechnology) at Colegio de Postgraduados, Salinas de Hidalgo, San Luis Potosí, Mexico.
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Gallegos-Sánchez
D000818:Animals; D004624:Embryo Transfer / Q000662:veterinary; D004958:Estradiol / Q000097:blood; D005260:Female; D005306:Fertilization / Q000187:drug effects; D005640:Follicle Stimulating Hormone / Q000008:administration & dosage / Q000494:pharmacology*; D006064:Gonadotropins, Equine / Q000008:administration & dosage / Q000494:pharmacology*; D007986:Luteinizing Hormone / Q000008:administration & dosage / Q000494:pharmacology*; D008297:Male; D009865:Oocytes; D010062:Ovulation Induction / Q000379:methods / Q000662:veterinary*; D034561:Sheep, Domestic; D013480:Superovulation / Q000187:drug effects
D006064:Gonadotropins, Equine; D004958:Estradiol; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone
Pelibuey sheep; embryos; gonadotropins; super-ovulation