Browsing by Author "Vega Barrionuevo, Jeremy Mateo"

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    Relación entre la concentración de la hormona Foliculoestimulante y el crecimiento folicular en respuesta a la estimulación ovárica con dosis baja (125 UI) de hormona por vía epidural
    (Universidad de Cuenca. Facultad de Ciencias Agropecuarias, 2026-02-12) Boada Alvarez, Gonzalo Abraham; Torres Cueva, David Ramón; Vega Barrionuevo, Jeremy Mateo; Ayala Guanga, Luis Eduardo
    The present study aimed to evaluate the endocrine and ovarian responses to stimulation with a low dose of follicle-stimulating hormone (FSH) administered via the epidural route in bovine heifers. The study was conducted at the Nero Experimental Farm of the University of Cuenca, using eight crossbred Holstein heifers, which initially served as the control group (T0) and subsequently as the treated group (T1). Prior to treatment, follicular wave synchronization was performed through the administration of estradiol benzoate, prostaglandin F2α, and an intravaginal progesterone-releasing device. On day 4 of the protocol, animals in T1 received a single epidural dose of 125 IU of FSH, whereas those in T0 received a placebo. Blood samples were collected on days 4, 5, and 6 of the protocol at four daily time points to determine serum FSH concentrations, in addition to ultrasonographic evaluations of follicular development. The results demonstrated a significant increase in FSH concentrations in the treated group starting two hours after administration, with elevated levels maintained until day 6 of the protocol. This hormonal increase was associated with more sustained and stable follicular growth compared with the control group. In conclusion, epidural administration of a low dose of FSH induced a favorable hormonal profile that optimized follicular development, representing an efficient alternative for protocols preceding ultrasound-guided follicular aspiration in bovine heifers.