Factors that affect the interval from calving to first ovulation, to first service, and to conception in milking cows in the Mantaro valley during the rainy season

D. Carlos Arana; C. Luisa Echevarría; C. Julia Segura

Factors that affect the interval from calving to first ovulation, to first service, and to conception in milking cows in the Mantaro valley during the rainy season

D. Carlos Arana, C. Luisa Echevarría, C. Julia Segura

Medicina Veterinaria

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© 2006 Universidad Nacional Mayor de San Marcos. All rights reserved. A reproductive study was conducted in the El Mantaro valley, Junín, Peru. Forty milking cows from 6 farms were monitored during the rainy season. The effect of breed, parity, milk yield, farm, and technological level on the interval from calving to first ovulation (CFOI), to first service (CFSI), and to conception (CCI) were evaluated. CFOI was determined through progesterone radioimmunoassayconcentration in defatted milk. CFOI was within the expected range for dairycattle (41.2 ± 20.2 days); however, CFSI (118.4 ± 69.2) and CCI (171.3 ± 105.5 days) were too long, possibly due to heat detection failures and nutritional constraints. Farm technological level was the onlyvariable of importance that affected CFSI.

Idioma original	Inglés estadounidense
Páginas (desde-hasta)	108-113
Número de páginas	6
Publicación	Revista de Investigaciones Veterinarias del Peru
Estado	Publicada - 1 ene. 2006

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title = "Factors that affect the interval from calving to first ovulation, to first service, and to conception in milking cows in the Mantaro valley during the rainy season",

abstract = "{\textcopyright} 2006 Universidad Nacional Mayor de San Marcos. All rights reserved. A reproductive study was conducted in the El Mantaro valley, Jun{\'i}n, Peru. Forty milking cows from 6 farms were monitored during the rainy season. The effect of breed, parity, milk yield, farm, and technological level on the interval from calving to first ovulation (CFOI), to first service (CFSI), and to conception (CCI) were evaluated. CFOI was determined through progesterone radioimmunoassayconcentration in defatted milk. CFOI was within the expected range for dairycattle (41.2 ± 20.2 days); however, CFSI (118.4 ± 69.2) and CCI (171.3 ± 105.5 days) were too long, possibly due to heat detection failures and nutritional constraints. Farm technological level was the onlyvariable of importance that affected CFSI.",

author = "{Carlos Arana}, D. and {Luisa Echevarr{\'i}a}, C. and {Julia Segura}, C.",

year = "2006",

month = jan,

day = "1",

language = "American English",

pages = "108--113",

journal = "Revista de Investigaciones Veterinarias del Peru",

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publisher = "Facultad de Medicina Veterinaria, Universidad Nacional Mayor de San Marcos",

}

Factors that affect the interval from calving to first ovulation, to first service, and to conception in milking cows in the Mantaro valley during the rainy season. / Carlos Arana, D.; Luisa Echevarría, C.; Julia Segura, C.
En: Revista de Investigaciones Veterinarias del Peru, 01.01.2006, p. 108-113.

Producción científica: Contribución a una revista › Artículo › revisión exhaustiva

TY - JOUR

T1 - Factors that affect the interval from calving to first ovulation, to first service, and to conception in milking cows in the Mantaro valley during the rainy season

AU - Carlos Arana, D.

AU - Luisa Echevarría, C.

AU - Julia Segura, C.

PY - 2006/1/1

Y1 - 2006/1/1

N2 - © 2006 Universidad Nacional Mayor de San Marcos. All rights reserved. A reproductive study was conducted in the El Mantaro valley, Junín, Peru. Forty milking cows from 6 farms were monitored during the rainy season. The effect of breed, parity, milk yield, farm, and technological level on the interval from calving to first ovulation (CFOI), to first service (CFSI), and to conception (CCI) were evaluated. CFOI was determined through progesterone radioimmunoassayconcentration in defatted milk. CFOI was within the expected range for dairycattle (41.2 ± 20.2 days); however, CFSI (118.4 ± 69.2) and CCI (171.3 ± 105.5 days) were too long, possibly due to heat detection failures and nutritional constraints. Farm technological level was the onlyvariable of importance that affected CFSI.

AB - © 2006 Universidad Nacional Mayor de San Marcos. All rights reserved. A reproductive study was conducted in the El Mantaro valley, Junín, Peru. Forty milking cows from 6 farms were monitored during the rainy season. The effect of breed, parity, milk yield, farm, and technological level on the interval from calving to first ovulation (CFOI), to first service (CFSI), and to conception (CCI) were evaluated. CFOI was determined through progesterone radioimmunoassayconcentration in defatted milk. CFOI was within the expected range for dairycattle (41.2 ± 20.2 days); however, CFSI (118.4 ± 69.2) and CCI (171.3 ± 105.5 days) were too long, possibly due to heat detection failures and nutritional constraints. Farm technological level was the onlyvariable of importance that affected CFSI.

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Factors that affect the interval from calving to first ovulation, to first service, and to conception in milking cows in the Mantaro valley during the rainy season

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