Clinical Research Directory

Inclusion Criteria: * Gestational age of 38-41 weeks, * Newborn birth weight \>2500 g * Stable vital signs before the procedure, * Postanatal age between 2-28 days, * No contraindications to the administration of hepatitis B vaccine * Delivery of the newborn to the mother after birth * Consent of the parents of the newborn to participate in the study * Fasting less than 3 hours/30 minutes before feeding * A valid score on the newborn hearing screening test * Newborn not crying before vaccination Exclusion Criteria: * Newborn babies requiring respiratory support, * Newborns with any neurological disorder (seizures) * Newborns taking opiates or born to mothers taking opiates * Newborns receiving muscle relaxants, sedatives, analgesics * Babies with major congenital anomalies * Neonates with an APGAR score of less than 7 at 5 minutes * Neonates who have undergone surgery * Newborns with birth trauma (especially rapid delivery) * Conditions that may prevent communication with parents (e.g. speech problem) * Hearing impairment * Newborns who will be transferred to another hospital