Parental voice emerges as a key resource when aiming to strengthen parent-infant bonding. During pregnancy, fetal auditory capacity is fully developed around 25 gestational weeks, and fetal response to auditory stimuli has been recorded as early as 19 weeks.Thus, parental voice, and particularly maternal voice, can serve as a familiar and comforting link between the protected environment in utero and the often-overwhelming NICU sensory environment.