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Effect of the anticipation of the of application of prostaglandin on the reproductive performance of beef cattle cows submitted to artificial insemination in fixed time Antecipação da aplicação de prostaglandina, em programa de inseminação artificial em tempo fixo em vacas de corte

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Author(s): Carlos Santos Gottschall | Hélio Radke Bittencourt | Rodrigo Costa Mattos | Ricardo Macedo Gregory

Journal: Revista Brasileira de Saúde e Produção Animal
ISSN 1519-9940

Volume: 10;
Issue: 4;
Date: 2009;
Original page

ABSTRACT
The effect of the anticipation of the application of prostaglandin F2alfa (PGF2a) was evaluated for the use of fixed time artificial insemination (FTAI). Three hundred and six Aberdeen Angus cows, aged between 3 and 6 years old, with calves at side had been used. The animals were randomly distributed in 4 groups. All animals were synchronized through intravaginal device with progesterone for 8 days (CIDR®), estradiol and PGF2a. The treatments was designed in a factorial arrangement 2 x 2 (CIDR® 1º x 2º use) and the day of the PGF2a application (6.5th x 8 th day). Seven days after the FTAI clean up bulls were joined until the ending of the breeding season. The conception rate to the FTAI and final pregnancy rate were evaluated. The anticipation of the application of the PGF2a (6.5th day) had significant effect (P
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