Fitriyah, N.N., Zein, S.A.W. and Ulumi, A.N. 2026. A Pilot Comparative Study of Vocal and Instrumental Acoustic Stimulation on Early Embryonic Brain Morphology in Gallus gallus. Biomedical Journal of Indonesia. 12, 3 (Oct. 2026), 227–232. DOI:https://doi.org/10.32539/bji.v12i3.351.