PREGNANCY RATE OF RECIPIENT COWS AFTER TRANSFER OF IN VITRO-PRODUCED NELLORE EMBRYOS

PREGNANCY RATE OF RECIPIENT COWS AFTER TRANSFER OF IN VITRO-PRODUCED NELLORE EMBRYOS

ABSTRACT The objective of this study was to evaluate the pregnancy rate (PR) of cows of six farms in Bolivia and in the states of Acre and Rondônia in Brazil after the transfer of 4,321 in vitro Nellore embryos produced by a private company, in 2015 to 2016. The effects of the farm location, year of...

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Veröffentlicht in:Caatinga 2019-10, Vol.32 (4), p.1087-1091
Hauptverfasser: JAGUSZESKI, MÔNICA ZUCHELLI, PINTO NETO, ADALGIZA, OLIVEIRA, WILLIAM DE, CATTELAM, JONATAS, GREGIANINI, HELTON APARECIDO GARCIA
Format: Artikel
Sprache:eng ; por
Schlagworte:
AGRICULTURE, DAIRY & ANIMAL SCIENCE
AGRONOMY
Cattle
Developmental stages
Dry season
Embryo transfer
Embryos
Farms
FISHERIES
FOOD SCIENCE & TECHNOLOGY
FORESTRY
Pregnancy
VETERINARY SCIENCES
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Zusammenfassung:ABSTRACT The objective of this study was to evaluate the pregnancy rate (PR) of cows of six farms in Bolivia and in the states of Acre and Rondônia in Brazil after the transfer of 4,321 in vitro Nellore embryos produced by a private company, in 2015 to 2016. The effects of the farm location, year of embryo transfer (ET), season of ET, number of previous ET per recipient, and embryo development stage on the PR of the recipient cow (chi square p0.05). The PR found after embryo transfer for recipient cows that had already been used once (45.58%) or twice (43.40%) for this purpose were higher than that of recipient cows used three to eight times (29.01%) (p
ISSN:0100-316X
1983-2125
1983-2125
DOI:10.1590/1983-21252019v32n425rc