Inclusion Criteria:  gestational age between 38 and 42 weeks, birth weight of 2500 - 4000 g, Apgar score of 8 and higher at 1st and 5th minute, having breastfed at least half an hour before the procedure, not showing any disease symptom,  Exclusion Criteria:  having congenital anomaly, getting a good hearing test result having received any invasive intervention other than Vitamin K and Hepatitis B vaccine.