Parâmetros reprodutivos de cabras Toggenburg inseminadas com sêmen resfriado, após diluição em meio à base de gema de ovo

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Abstract

The conception rate, the prostaglandin response, the estrus duration, the reproductive class, and the mucous of goats inseminated with semen diluted in egg yolk extender and cooled at 5°C, for 12 or 24 hours were evaluated. Sixty-two female goats and two sexually mature Toggenburg bucks were used. The females received two doses of 22.5μg of prostaglandine F2α, at 10-day intervals. After the first injection, the estrus was monitored three times a day (6:00, 12:00, and 18:00h), with a buck teaser. Only one insemination was used. The percentages of animals that showed estrus after the first and the second injection of PGF2α were 85.5% and 88.7%, respectively. The average intervals from first and second PGF2α injection to estrus were 41.04±20.32 and 45.67±9.28h, and the estrus durations for both injections were 40.02±15.96 and 32.24±12.09h, in this order. The interval from the PGF2α injection to the beginning of the estrus was longer (P<0.05), whereas the estrus duration was shorter (P<0.05) in the estrus induced after the second PGF2α injection. The total conception rate was 49.1%. Neither the semen storage length (12 or 24 hours) nor the reproductive class did not affect (P>0.05) the conception rate. The mucous observed at the insemination time influenced (P<0.05) the fertility of inseminated goats, with the striated aspect associated to higher fertility.

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Siqueira, A. P., Fonseca, J. F., Silva Filho, J. M., Bruschi, J. H., Viana, J. H. M., Palhares, M. S., … Peixoto, M. P. (2009). Parâmetros reprodutivos de cabras Toggenburg inseminadas com sêmen resfriado, após diluição em meio à base de gema de ovo. Arquivo Brasileiro de Medicina Veterinaria e Zootecnia, 61(2), 299–305. https://doi.org/10.1590/S0102-09352009000200003

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