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Avaliaram-se a taxa de concepção, a resposta à prostaglandina, a duração do estro, a categoria reprodutiva e o tipo de muco de cabras inseminadas com sêmen diluído em meio à base de gema de ovo e resfriado a 5ºC, por 12 ou 24 horas. Foram utilizados dois reprodutores e 62 fêmeas da raça Toggenburg, que receberam duas doses de 22,5µg de PGF2&#945;, em intervalos de 10 dias, para a sincronização do estro. A partir da primeira aplicação de PGF2&#945;, o estro foi monitorado três vezes ao dia. Realizou-se uma única inseminação, 12 horas após o início do estro. As porcentagens de fêmeas em estro, após a primeira e segunda aplicações de PGF2&#945;, foram de 85,5% e 88,7%, respectivamente. O intervalo de aplicação da primeira e segunda doses de PGF2&#945; ao início do estro foi de 41,04±20,32 e 45,67±9,28 horas, e a duração do estro de 40,02±15,96 e 32,24±12,09 horas, respectivamente. A taxa de concepção total foi de 49,1%. O período de armazenamento do sêmen e a categoria reprodutiva não influenciaram (P>0,05) a taxa de concepção. O tipo de muco observado no momento da inseminação influenciou (P<0,05) a fertilidade das fêmeas, sendo o de aspecto estriado associado aos maiores índices de concepção. 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 5ºC, 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 F2&#945;, 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 PGF2&#945; were 85.5% and 88.7%, respectively. The average intervals from first and second PGF2&#945; 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 PGF2&#945; 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 PGF2&#945; 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

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