Evaluación del estado metabólico, el peso vivo y la condición corporal durante la gestación en vacas de carne en la Altillanura Colombiana

López-García, Gerardo; Orjuela, Agustín Góngora; Díaz-González, Félix; Rojas-Rodríguez, Adriana Patricia

doi:10.22579/20112629.565

Cited by 2 publications

References 31 publications

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Evaluation of intrinsic and extrinsic factors affecting pregnancy rate in dual-purpose cows under tropical conditions

Zavaleta-Martínez,

Barrientos-Morales,

Medina

et al. 2024

Trop Anim Health Prod

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A total of 648 embryo transfer (ET) procedures were performed between January and December 2021 and were evaluated to assess the effect of these two types of factors on in-vitro produced ET programs carried out in tropical conditions. The intrinsic factors were size and location of the corpus luteum, body condition, genetic group, age and parity; while extrinsic factors were location of the farm, environmental comfort, season in which ET was carried out, prevailing weather conditions, and the preservation, quality, and development stage of embryos at the time of transfer. A χi 2 was used for analysis of main effects, and logistic regression analysis for the combined effects in each factor (intrinsic or extrinsic); additionally, a multivariate analysis of data clusters were used to nd a linkage between the effects. While age of the recipient female had a negative effect (Odds ratio = 0.179-0.870) on PR (p < 0.05), being higher in younger cows; the rest of the intrinsic factors did not affect (p > 0.05) the PR. The extrinsic factors signi cant (p < 0.05) were THI category, season of the year and type of embryo preservation during the ET, which indicates that the higher PR (p < 0.05) were obtained in the comfort THI category, winter season and the use of fresh semen during the ET. The clustering analysis did not show any linkage (p > 0.05) between PR and the intrinsic factors, while a linkage (p < 0.05) was found with yearly season and embryo preservation as extrinsic factors. It is concluded that age of the recipient cow and environmental conditions at the time of the transfer are key factors to be considered for successful invitro produced ET programs using dual-purpose cows under tropical conditions.

show abstract

Evaluation of intrinsic and extrinsic factors affecting pregnancy rate in dual-purpose cows under tropical conditions

Zavaleta-Martínez,

Barrientos-Morales,

Medina

et al. 2024

Trop Anim Health Prod

View full text Add to dashboard Cite

show abstract

Evaluation of intrinsic and extrinsic factors affecting pregnancy rate in dual-purpose cows under tropical conditions

Zavaleta-Martínez,

Barrientos-Morales,

Abasalon-Medina

et al. 2023

Preprint

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A total of 648 embryo transfer (ET) procedures were performed between January and December 2021 and were evaluated to assess the effect of these two types of factors on in-vitro produced ET programs carried out in tropical conditions. The intrinsic factors were size and location of the corpus luteum, body condition, genetic group, age and parity; while extrinsic factors were location of the farm, environmental comfort, season in which ET was carried out, prevailing weather conditions, and the preservation, quality, and development stage of embryos at the time of transfer. A χi2 was used for analysis of main effects, and logistic regression analysis for the combined effects in each factor (intrinsic or extrinsic); additionally, a multivariate analysis of data clusters were used to find a linkage between the effects. While age of the recipient female had a negative effect (Odds ratio = 0.179–0.870) on PR (p < 0.05), being higher in younger cows; the rest of the intrinsic factors did not affect (p > 0.05) the PR. The extrinsic factors significant (p < 0.05) were THI category, season of the year and type of embryo preservation during the ET, which indicates that the higher PR (p < 0.05) were obtained in the comfort THI category, winter season and the use of fresh semen during the ET. The clustering analysis did not show any linkage (p > 0.05) between PR and the intrinsic factors, while a linkage (p < 0.05) was found with yearly season and embryo preservation as extrinsic factors. It is concluded that age of the recipient cow and environmental conditions at the time of the transfer are key factors to be considered for successful in-vitro produced ET programs using dual-purpose cows under tropical conditions.

show abstract

Evaluación del estado metabólico, el peso vivo y la condición corporal durante la gestación en vacas de carne en la Altillanura Colombiana

Cited by 2 publications

References 31 publications

Evaluation of intrinsic and extrinsic factors affecting pregnancy rate in dual-purpose cows under tropical conditions

Evaluation of intrinsic and extrinsic factors affecting pregnancy rate in dual-purpose cows under tropical conditions

Evaluation of intrinsic and extrinsic factors affecting pregnancy rate in dual-purpose cows under tropical conditions

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