Embryonic losses between the early diagnosis and the confirmation of gestation in dairy cows from different farms for one year

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Miguel Ángel Lammoglia-Villagómez https://orcid.org/0000-0002-2958-0518
Rebeca Rojas-Ronquillo https://orcid.org/0000-0003-3911-0779
Amalia Cabrera-Núñez https://orcid.org/0000-0002-3828-5940
Sokani Sánchez-Montes https://orcid.org/0000-0001-6316-2187
Jorge Chagoya https://orcid.org/0000-0001-5139-6322
Javier Cruz Huerta-Peña https://orcid.org/0000-0001-5007-1032
Edelmira Jácome-Sosa https://orcid.org/0000-0002-9974-5584
Pablo Roberto Marini https://orcid.org/0000-0003-0826-0387

Keywords

embryonic losses, Mexican Altiplano, dairy cattle.

Resumen

Objective: To determine embryonic losses between the early diagnosis and the confirmation of gestation in dairy cows from different barns for one year.


Design/Methodology/Approach: A total of 3,413 confined Holstein cows from three different dairy barns in the Mexican Altiplano (highlands) were studied. Cows were milked three times a day with an average daily production of 36.5 ± 1.5 L. Gestation diagnosis was performed by ultrasonography at 34 ± 7 d after the artificial insemination, while gestation was confirmed at 60 ± 5 d. Average pregnancy loss was determined and embryonic losses were compared taking into account barn and month.


Results: The overall average of embryonic losses was 18.8%. Neither the month factor nor the month × barn interaction affected the percentage of embryonic losses (p<0.05). Differences per barn (p<0.05) were observed and barns 1, 2, and 3 recorded losses percentages of 4 ± 1.6 %, 11.4 ± 1.6 %, and 22.9 ± 1.6%, respectively.


Study Limitations/Implications: Detailed differences between barns were not studied, since cow management was similar in all three of them. Embryonic losses must be recorded, given their significant impact on the barn.


Findings/Conclusions: There is a high variability among barns regarding embryonic losses between the early diagnosis and the confirmation of gestation. This situation may be the result of management differences, since the breed and environmental conditions were the same in all three barns.

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