Fresh embryo transfer, in dairy cows, using two hormonal artificial insemination protocols at a fixed time, adding eCG and without adding eCG
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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.
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Dany Thomás García-Herembás, Universidad Central del Ecuador
0009000973057730
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 Alberto Vargas-Tipan, Universidad Central del Ecuador
0000000263275875
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 FMVZ- UCE.
Utilice
Sergio Rolando Chacha-Vega, Universidad Central del Ecuador
https://orcid.org/0000-0002-9212-
0098
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 - Ecuador
https://orcid.org/0000-0001-9757-
9757
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.
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