Influence of the reuse of progesterone implants in a fixed-time artificial insemination protocol on the conception rates of lactating cows during two different seasons

This study aimed to evaluate the influence of reusing progesterone intravaginal implants using a fixed-time artificial insemination (FTAI) protocol on the conception rates of 593 primiparous and multiparous lactating cows during two different seasons. The cows were divided into two categories: multi...

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Bibliographic Details
Published in:African journal of biotechnology 2015-01, Vol.14 (4), p.278-282
Main Authors: Thaisa, Campos Marques, Karen, Martins Leao, Natalia, do Carmo Silva, Moraima, Castro Rodrigues, Rossane, Pereira da Silva, Patricia, Antonio
Format: Article
Language:English
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Summary:This study aimed to evaluate the influence of reusing progesterone intravaginal implants using a fixed-time artificial insemination (FTAI) protocol on the conception rates of 593 primiparous and multiparous lactating cows during two different seasons. The cows were divided into two categories: multiparous and primiparous. The experiment was conducted during seasons with high and mild temperatures. To compare the conception rates during both seasons, the animals were randomly divided into three groups according to use progesterone implant (1 super(st) use, 2 super(nd) use and 3 super(rd) use) on the first day of the synchronization protocol for FTAI within each category. A pregnancy diagnosis was performed at 30 days following FTAI. The temperature and humidity index was higher (P
ISSN:1684-5315
1684-5315
DOI:10.5897/AJB2014.14329