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Revista Colombiana de Ciencias Pecuarias
versão impressa ISSN 0120-0690versão On-line ISSN 2256-2958
Resumo
SALGADO, Roger D; RUGELES, Clara C e ALVAREZ, Jaime. Heparin and spermatic concentration effect over the percentage of in vitro fertilization of bovine oocites. Rev Colom Cienc Pecua [online]. 2005, vol.18, n.2, pp.122-126. ISSN 0120-0690.
The objective of this study was to evaluate the effect of different heparin concentrations and of the semen in the percentage of bovine oocytes in fertilization medium. In the experiment 1, the obtained oocytes of slaughterhouse ovaries were matured in vitro and distributed at random in six treatments for fertilization in vitro, according to the heparin concentration (2, 4, 8, 10, 16, 20 µg/ ml). In the experiment 2, once selected the heparin concentration from experiment 1, three sperms doses were evaluated in fertilization medium (0.5x106 espermatozoas/ml, 1x06 espermatozoas/ml and 2x06 espermatozoas/ml). In each experiment totally randomized design was used and data were analyzed by ANAVA. The concentration of heparin (p<0.05) affected the percentage of fertilized oocytes being the best results in the concentration of 10 µg/ml, with a rate of penetration of 67%. The spermatic concentration affects the fertilization, the biggest oocytes proportion with normal fertilization (74%) when using concentration 2x106 spermatozoas/ml. However, it was not significantly different to the concentration of 1x 106 (p>0.05). The results indicate that the fertilization rate keeps direct relationship with the heparine dose and the spermatic concentration.
Palavras-chave : bovine; fertilization in vitro; heparin; swim up.