Fresh embryo transfer, in dairy cows, using two hormonal artificial insemination protocols at a fixed time, adding eCG and without adding eCG

Article Sidebar

PDF (Español (España))
Published: Jun 3, 2025
DOI: https://doi.org/10.33386/593dp.2025.3.3181
Keywords:
Follicular dynamics, reproductive efficiency, gonadotropins, artificial insemination, embryo transfer Dinámica folicular, eficiencia reproductiva, gonadotropinas, inseminación artificial, transferencia de embriones

Main Article Content

David Monteros
Dany Thomás García Herembás
Universidad Central del Ecuador
https://orcid.org/0009-0009-7305-7730
Juan Vargas
Universidad Central del Ecuador
https://orcid.org/0000-0002-6327-5875
Sergio Rolando Chacha Vega
Universidad Central del Ecuador
https://orcid.org/0000-0002-9212-0098
Jhonatan Adrian Monteros Pazmiño
Universidad Estatal de Bolívar
https://orcid.org/0000-0001-9757-9757

Abstract

The study on bovine follicular dynamics and embryo transfer seeks to optimize reproductive efficiency in dairy cattle. The application of hormones in fixed-time artificial insemination (FTAI) protocols allows improving pregnancy rates and embryo quality, contributing to the advancement of reproductive biotechnologies. General Objective: Determine the effect of the addition of eCG in an IATF hormonal protocol on the size of the corpus luteum and pregnancy rates in recipient cows. Methodology: An experimental design was used with 20 dairy cows divided into two groups, with and without administration of eCG. Gynecological check-ups, estrus synchronization and embryo transfer were performed. Data collection included measurements of the corpus luteum and pregnancy diagnosis by ultrasound. Results: The protocols with eCG showed greater synchronization of estrus, a more developed size of the corpus luteum and a significant increase in the pregnancy rate compared to the protocols without this hormone. Conclusions: The use of eCG in IATF protocols improves reproductive efficiency by promoting follicular maturation and increasing pregnancy rates. The proper selection of donors and recipients is essential for the success of the procedure.

Downloads

Download data is not yet available.

Article Details

How to Cite
Monteros, D., García Herembás, D. T., Vargas, J., Chacha Vega, S. R. ., & Monteros Pazmiño, J. A. . (2025). Fresh embryo transfer, in dairy cows, using two hormonal artificial insemination protocols at a fixed time, adding eCG and without adding eCG. 593 Digital Publisher CEIT, 10(3), 1163-1173. https://doi.org/10.33386/593dp.2025.3.3181
Issue
Vol. 10 No. 3 (2025): Multidisciplinary
Section
Investigaciones /estudios empíricos
Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

1. Derechos de autor
Las obras que se publican en 593 Digital Publisher CEIT están sujetas a los siguientes términos:
1.1. 593 Digital Publisher CEIT, conserva los derechos patrimoniales (copyright) de las obras publicadas, favorece y permite la reutilización de las mismas bajo la licencia Licencia Creative Commons 4.0 de Reconocimiento-NoComercial-CompartirIgual 4.0, por lo cual se pueden copiar, usar, difundir, transmitir y exponer públicamente, siempre que:
1.1.a. Se cite la autoría y fuente original de su publicación (revista, editorial, URL).
1.1.b. No se usen para fines comerciales u onerosos.
1.1.c. Se mencione la existencia y especificaciones de esta licencia de uso.

Author Biographies

Dany Thomás García Herembás, Universidad Central del Ecuador

Full name and surname: Thomás García.
Email: dtgarcia@uce.edu.ec
Affiliation: Central University of Ecuador
ORCID identifier: 0009-0009-7305-7730
I am a zootechnical veterinarian, with a
master's degree in animal production with
a mention in beef and dairy cattle, I work
as an administrator of the Uyumbicho
Experimental Center of the UCE, I am
also a part-time professor at the
Equinoctial Technological University in
Quito.

Juan Vargas, Universidad Central del Ecuador

Full name and surname: Juan Vargas
Email: javargas@uce.edu.ec
Affiliation:
ORCID identifier: 0000-0002-6327-5875
Doctor of Veterinary Medicine and
Zootechnics with a master's degree in
animal production and a specialization in
animal reproduction. I currently work as a
professor at the Central University of
Ecuador, teaching the subjects of animal
reproduction, biotechnology of animal
reproduction and general surgery. I am
also responsible for the animal
reproduction laboratory of the FMVZUCE.

Sergio Rolando Chacha Vega, Universidad Central del Ecuador

Doctor in Veterinary Medicine and
Animal Husbandry with a master's
degree in molecular biotechnology. I
currently work as a professor at the
Central University of Ecuador, teaching
general pathology, semiology and farm
animals. I am also responsible for the
pathology laboratory.

Jhonatan Adrian Monteros Pazmiño, Universidad Estatal de Bolívar

I am a veterinarian and zootechnician
with a master's degree in animal
production, specializing in beef and dairy
cattle. I currently work as a professor at
the State University of Bolívar, teaching
courses in animal reproduction
biotechnology, physiology, embryology,
and infectious diseases. I also direct
research related to my area of study and
expertise, and I also direct research
projects and collaborate with the UEB.

References

Cabero, L., & Rodriguez, D. (2007). Obstetricia y medicina materno-fetal. Ed. Médica Panamericana. https://books.google.es/books?hl=es&lr=&id=AGh8rK1MmOsC&oi=fnd&pg=PA951&dq=Hern%C3%A1ndez,+M.+(1994).+Endocrinolog%C3%ADa.+Fisiolog%C3%ADa+General.+Quito:+UCE&ots=R3bTj0PHqv&sig=tz9sxIraH2i482r44kRN4Pvd9lQ

Callejas, E. A. (2012). Grupo de biotecnología de la reproducción, superovulación y transferencia de embriones bovinos. Córdoba: INTA.

Del Valle, T. (2008). Dinámica folicular ovárica durante el ciclo estral en vacas doble propósito. Desarrollo sostenible de ganadería doble propósito. cap: XLIV. Pag, 553.

Duica, A., Tovío, N., & Grajales, H. (2007). Factores que afectan la eficiencia reproductiva de la hembra receptora en un programa de transplante de embriones bovinos. Revista de Medicina Veterinaria, 14, 107-124.

Espinoza, J. L., Ortega, R., Palacios, A., Valencia, J., & Aréchiga, C. F. (2007). Crecimiento folicular ovárico en animales domésticos: Una revisión. Interciencia, 32(2), 93-99.

Galina, C., Saltiel, A., Valencia, J., Becerril, J., Bustamante, G., Calderón, A., Duchateau, A., Fernández, S., Olguín, A., & Páramo, R. (2008). Reproducción de animales domésticos. https://www.sidalc.net/search/Record/KOHA-OAI-AGRO:2167/Description

García, F. (2023). Los inciertos orígenes de la libertad condicional en España. Revista de Estudios Penitenciarios, 85.

Gutiérrez, J., Palomares, G., Hernández, E., Leyva, J., Díaz, E., & Herrera, E. (2021). Frecuencia de enfermedades de impacto reproductivo en bovinos de doble propósito ubicados en Oaxaca, México. Abanico Orellana, J. C., & Peralta, E. M. (2007). Manual de procedimientos para el laboratorio de transferencia de embriones en bovinos de la empresa Genetic Resources International (GRI) and Sexing Technologies [PhD Thesis, Zamorano: Escuela Agrícola Panamericana-2012]. https://bdigital.zamorano.edu/bitstream/11036/758/1/T2520.pdf

Salguero, L. M. (2023). Aceleración en la obtención del genotipo a2a2 del gen de la beta caseína de la leche mediante superovulación y transferencia de embriones en la HACIENDA LA ESPERANZA. https://repositorio.utc.edu.ec/items/0f938b36-60b9-44f8-8f90-2b731ead8f81

Tríbulo, H. E., & Cutaia, L. (1996). Selección y manejo de receptoras de embriones bovinos. https://www.sidalc.net/search/Record/KOHA-OAI-AGRO:10159/Description