Diagnostic précoce de gravidité chez la vache grâce à l'observation de l'éjection du lait induite par l'ocytocine lutéale

Labussière, J.; Combaud, J. F.; Chevalerie, FA de la; André, D; Touze, JL; Cochaud, J.

doi:10.1051/rnd:19920211

Cited by 2 publications

(5 citation statements)

References 22 publications

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“…These results are consistent with those of Labussiere et al (1992) who obtained the accuracy of negative results of 100% for Hormonost test ® which was significantly higher (p<0.01) than negative results obtained with milk ejection test (93.5%). Nevertheless, Hormonost test ® was overwhelmingly better in negative results detection (84.6 vs. 41.6%).…”

supporting

confidence: 91%

“…Interpretation is simple (milk ejection is present or not) and the realization is fast (generally it takes less than 5 min) (Labussiere et al, 1992). Unlike our results, in a study of Labussiere et al (1992) it took on average 90 seconds for the ejection of 230 mL of cisternal milk. On average it lasts 189.5 seconds (max.…”

contrasting

confidence: 76%

“…RIA, as well as immunoenzyme progesterone tests, reach satisfactory accuracy (70-75%) for the positive and almost 100% for negative cases, both after 21 day post insemination (Humbolt et al, 1987;Bech-Sabat et al, 2008). CL can synthesize this peptide (Labussiere et al, 1992;Druckmann and Druckmann, 2005), whose tissue concentrations decline earlier than those of progesterone in the case of failed fertilization (Wathes et al, 1984;Ivell et al, 1985;Gabor et al, 2008). All these are reasons that have led us to try to establish the existence of early pregnancy CL, not by their secretion of progesterone, but by oxytocin.…”

Section: Introductionmentioning

confidence: 99%

“…24-72h before progesterone detection tests (Labussiere et al, 1992). 24-72h before progesterone detection tests (Labussiere et al, 1992).…”

mentioning

confidence: 99%

“…In group B of cows, considered to be pregnant with positive milk ejection test and negative progesterone test, we assumed that alveolar milk release is more reliable than the progesterone test to detect functional corpus luteum as indicated by Labussiere et al (1992), but probably in their respective study early embryonic mortality or persistent corpus luteum occurred. In group B of cows, considered to be pregnant with positive milk ejection test and negative progesterone test, we assumed that alveolar milk release is more reliable than the progesterone test to detect functional corpus luteum as indicated by Labussiere et al (1992), but probably in their respective study early embryonic mortality or persistent corpus luteum occurred.…”

mentioning

confidence: 99%

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The efficacy of milk ejection induced by luteal oxytocin as a method of early pregnancy diagnostics in cows

Grizelj¹,

Katana²,

Dobranić³

et al. 2010

Acta vet. (Beogr.)

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The aim of this research was to determine the accuracy and reliability of early diagnosis of pregnancy in cows using PGF2α analogue. Namely in the case of corpus luteum (CL) presence, the release of luteal oxytocin is induced by intravenous administration of a non luteolytic dose of PGF2α. The research was performed in 30 lactating cows, 18-22 days after insemination, and three hours prior to evening milking. A teat cannula is placed in the left fore-teat. When the cisternal milk flow ceased, Dinoprost (256 μg Dinolytic) was injected in the v. jugularis. If CL was present, the alveolar milk flow (559.4±83.7 mL) started 189±18 s later and early pregnancy could be presumed. If CL was no longer functional, the milk flow did not start again and the cow was considered not pregnant. Seventeen out of 30 cows were confirmed pregnant 35 days after insemination by ultrasound and 13 were found not pregnant. The accuracy of positive results is 100% and is identical to that obtained by EL

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supporting

confidence: 91%

contrasting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

“…24-72h before progesterone detection tests (Labussiere et al, 1992). 24-72h before progesterone detection tests (Labussiere et al, 1992).…”

mentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

The efficacy of milk ejection induced by luteal oxytocin as a method of early pregnancy diagnostics in cows

Grizelj¹,

Katana²,

Dobranić³

et al. 2010

Acta vet. (Beogr.)

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Oxytocin Release and Milk Removal in Ruminants

Bruckmaier

Blum

1998

Journal of Dairy Science

202

135

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Before milking, less than 20% of the milk yielded by dairy cows is stored within the cistern, where it is immediately available for removal. Most of the milk is available for the milking machine only after milk ejection, which occurs in response to tactile teat stimulation and oxytocin release. For complete milk removal, milk ejection is necessary throughout the entire milking process. The continuation of stimulatory effect of the milking machine until the end of milking is, therefore, essential. Premilking teat stimulation causes induction of alveolar milk ejection before the start of milking. Thus, bimodal milk flow curves (i.e., interruption of milk flow after removal of the cisternal milk) are avoided. Continual ejection of milk is dependent on the presence of elevated oxytocin concentrations during the entire milking. Any interruption of the milk ejection process can disturb milk removal. Disruption of milk removal can be caused by peripheral inhibition of oxytocin effects on the mammary gland or by inhibition of oxytocin release by the central nervous system. Peripheral inhibition is induced by elevated concentrations of catecholamines through stimulation of alpha-adrenergic receptors in the mammary gland, likely via changes in ductal resistance. Inhibition of oxytocin release by the central nervous system has been observed in primiparous cows immediately after parturition, during peak estrus, and during milking in unfamiliar surroundings; concentrations of beta-endorphin and cortisol are elevated in this situation. However, the role of endogenous opioid peptides in the inhibition of oxytocin release in cows remains unclear. In conclusion, during machine-milking, the physiological requirements of the cows need to be considered, and, most importantly, stressors must be minimized.

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Diagnostic précoce de gravidité chez la vache grâce à l'observation de l'éjection du lait induite par l'ocytocine lutéale

Abstract: Résumé ― Le diagnostic de gravidité décrit dans cet article repose sur l'observation de l'éjection lactée qui, en cas de maintien du corps jaune, résulte de

Cited by 2 publications

References 22 publications

The efficacy of milk ejection induced by luteal oxytocin as a method of early pregnancy diagnostics in cows

The efficacy of milk ejection induced by luteal oxytocin as a method of early pregnancy diagnostics in cows

Oxytocin Release and Milk Removal in Ruminants

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