2004
DOI: 10.5380/avs.v9i2.4065
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EFEITO DA ADMINISTRAÇÃO DO HORMÔNIO CORIÔNICO GONADOTRÓFICO (hCG) NA DURAÇÃO DO CICLO ESTRAL E NA TAXA DE PRENHEZ EM BOVINOS DE CORTE

Abstract: RESUMO -Palavras chave: hCG, duração do ciclo estral, fertilidade. ABSTRACT -In the present experiment a total of 62 cows of Charoles and Caracú breeds, artificially inseminated (AI). At day 7th after AI the cows were aleatory distributed in two groups: treated group (n=32) that receive 2.500 UI of human chorionic gonadotropin (hCG) by the intramuscular route and control group (n=30) to wich 1.0 ml of sterile physiological solution was administered also by the intramuscular route. It has been found that the es… Show more

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“…It has been shown in some previous studies that the formation of a new CL by ovulation of the dominant follicle of the first wave with hCG administration on the 4 th -7 th days after insemination in cows or the peripheral P 4 concentration is increased by improving the functions of the luteal cells of the existing CL (Santos et al, 2001;Fantini Filho et al, 2004;Walker et al, 2005;De Rensis et al, 2008). It is well known that P 4 , also known as the pregnancy hormone, plays an essential regulatory role in the formation and maintenance of pregnancy, both before and after insemination.…”
Section: Discussionmentioning
confidence: 99%
“…It has been shown in some previous studies that the formation of a new CL by ovulation of the dominant follicle of the first wave with hCG administration on the 4 th -7 th days after insemination in cows or the peripheral P 4 concentration is increased by improving the functions of the luteal cells of the existing CL (Santos et al, 2001;Fantini Filho et al, 2004;Walker et al, 2005;De Rensis et al, 2008). It is well known that P 4 , also known as the pregnancy hormone, plays an essential regulatory role in the formation and maintenance of pregnancy, both before and after insemination.…”
Section: Discussionmentioning
confidence: 99%