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Fixed-time insemination with frozen semen in mares: is it suitable for poorly fertile stallions?
Avanzi, Bruno Ribeiro; Ramos, Renata Dos Santos; Araujo, Gustavo Henrique Marques; Fioratti, Eduardo Gorzoni; Trinca, Luzia Aparecida; Dell'Aqua, José Antonio; Melo E Oña, Cely Marini; Zahn, Fabíola Soares; Martin, Ian; Alvarenga, Marco Antonio; Papa, Frederico Ozanam.
Afiliación
  • Avanzi BR; Department of Animal Reproduction and Veterinary Radiology, Faculdade de Medicina Veterinária e Zootecnia (FMVZ) - Universidade Estadual Paulista (UNESP), Botucatu, São Paulo, Brazil.
  • Ramos Rdos S; Department of Animal Reproduction and Veterinary Radiology, Faculdade de Medicina Veterinária e Zootecnia (FMVZ) - Universidade Estadual Paulista (UNESP), Botucatu, São Paulo, Brazil.
  • Araujo GH; Camilo Castelo Branco University, Descalvado, São Paulo, Brazil.
  • Fioratti EG; Department of Animal Reproduction and Veterinary Radiology, Faculdade de Medicina Veterinária e Zootecnia (FMVZ) - Universidade Estadual Paulista (UNESP), Botucatu, São Paulo, Brazil.
  • Trinca LA; Department of Biostatistics - UNESP, Botucatu, São Paulo, Brazil.
  • Dell'Aqua JA; Department of Animal Reproduction and Veterinary Radiology, Faculdade de Medicina Veterinária e Zootecnia (FMVZ) - Universidade Estadual Paulista (UNESP), Botucatu, São Paulo, Brazil.
  • Melo E Oña CM; Veterinary School of Goiás Federal University, Goiânia, Goiás, Brazil.
  • Zahn FS; Department of Animal Reproduction and Veterinary Radiology, Faculdade de Medicina Veterinária e Zootecnia (FMVZ) - Universidade Estadual Paulista (UNESP), Botucatu, São Paulo, Brazil.
  • Martin I; Department of Animal Reproduction and Veterinary Radiology, Faculdade de Medicina Veterinária e Zootecnia (FMVZ) - Universidade Estadual Paulista (UNESP), Botucatu, São Paulo, Brazil.
  • Alvarenga MA; Department of Animal Reproduction and Veterinary Radiology, Faculdade de Medicina Veterinária e Zootecnia (FMVZ) - Universidade Estadual Paulista (UNESP), Botucatu, São Paulo, Brazil.
  • Papa FO; Department of Animal Reproduction and Veterinary Radiology, Faculdade de Medicina Veterinária e Zootecnia (FMVZ) - Universidade Estadual Paulista (UNESP), Botucatu, São Paulo, Brazil. Electronic address: papa@fmvz.unesp.br.
Theriogenology ; 83(9): 1389-93, 2015 Jun.
Article en En | MEDLINE | ID: mdl-25805693
The purpose of the present study was to compare two protocols for equine frozen semen programs using either postovulation insemination or fixed-time insemination (FT), evaluating both pregnancy rates and intrauterine fluid (IUF) accumulation after artificial insemination with semen obtained from either highly or poorly fertile stallions. Six ejaculates from two stallions (n = 12) were processed. After thawing, semen samples were evaluated by computerized semen analysis. Fifteen mares (30 cycles) were inseminated with frozen semen from highly fertile stallion A, and 14 mares (28 cycles) were inseminated with frozen semen from poorly fertile stallion B. Ovulations were induced with 1 mg (intramuscular) of deslorelin acetate after the observation of a greater than 35 mm follicle and uterine edema. In postovulation insemination group, mares were inseminated once with 800 × 10(6) total sperm in a maximum 6-hour interval after ovulation. In FT group, mares were inseminated twice with 400 × 10(6) total sperm, 24 and 40 hours after induction. Mares were ultrasonographically examined for IUF accumulation 24 hours and for pregnancy diagnosis 14 days after the last insemination. Although IUF accumulation was more evident in mares inseminated once postovulation, pregnancy rates were similar for both protocols, regardless of the stallion, although a significant effect of the stallion was observed. These results indicated that FTs may be used for both highly and poorly fertile stallions as a practical tool to help spreading the use of frozen semen in equine reproduction programs.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Cruzamiento / Inseminación Artificial / Caballos Tipo de estudio: Guideline Límite: Animals / Pregnancy Idioma: En Revista: Theriogenology Año: 2015 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Cruzamiento / Inseminación Artificial / Caballos Tipo de estudio: Guideline Límite: Animals / Pregnancy Idioma: En Revista: Theriogenology Año: 2015 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Estados Unidos