Somatotropina vs. hormona foliculoestimulante: recuento folicular antral en vacas lactantes y no lactantes

I. U. Payano; C. Q. Eulogio; E. A. Gomez; F. A. Villar; J. U. Fermín; E. Saavedra; Y. Mauricio-Ramos; V. Sarapura; J. Ninahuanca

doi:10.30972/vet.3618159

Authors

I. U. Payano Universidad Nacional del Centro del Perú. Departamento Académico de Zootecnia https://orcid.org/0000-0002-6441-5016
C. Q. Eulogio Universidad Peruana Los Andes. Facultad de Ciencias de la Salud https://orcid.org/0000-0002-2316-1646
E. A. Gomez Universidad Peruana Los Andes. Facultad de Ciencias de la Salud https://orcid.org/0000-0002-5119-5202
F. A. Villar Universidad Nacional del Centro del Perú. Departamento Académico de Zootecnia https://orcid.org/0000-0002-1768-8388
J. U. Fermín Universidad Peruana Los Andes. Facultad de Ciencias de la Salud https://orcid.org/0000-0001-9192-3991
E. Saavedra Universidad Nacional del Centro del Perú. Departamento Académico de Zootecnia https://orcid.org/0000-0002-0827-9398
Y. Mauricio-Ramos Universidad Nacional del Centro del Perú. Departamento Académico de Zootecnia https://orcid.org/0009-0008-1518-6238
V. Sarapura Universidad Nacional del Centro del Perú. Facultad de Ciencias Forestales y del Ambiente https://orcid.org/0000-0003-1789-7574
J. Ninahuanca Universidad Nacional del Centro del Perú. Departamento Académico de Zootecnia https://orcid.org/0000-0002-0137-0631

DOI:

https://doi.org/10.30972/vet.3618159

Keywords:

Follicle stimulant, hormone treatments, follicle size, in vitro

Abstract

The objective was to evaluate the effect of follicle stimulating hormone (FSH) and bovine somatotropin (bST) on follicular dynamics in lactating and non-lactating dairy cows. A 2×2 factorial ANOVA was performed, considering lactation status and the hormone used as factors. A total of 20 cows were administered, 10 lactating (5 treated with FSH and 5 with bST) and 10 non-lactating (5 treated with FSH and 5 with bST). In lactating cows, bST treatment resulted in a significantly higher total follicle count (16.4 ± 2.3) compared to FSH (11.8 ± 1.92), whereas no significant differences were observed in non-lactating cows (p>0.05). Regarding the number of follicles measuring 2-4 mm, significant differences (p<0.05) were found in lactating cows, with bST resulting in a higher count (12 ± 1.41) compared to FSH (6.4 ± 1.34). For follicles measuring 4-8 mm, no significant differences were observed between groups (p>0.05). In terms of viability, bST showed better results, with significant differences (p<0.05) compared to the FSH group in both lactating and non-lactating cows. These findings highlight the need to adjust hormonal protocols based on the cows’ physiological state to maximize viable oocyte production, which is crucial for assisted reproduction and improving reproductive efficiency in the livestock industry.

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