Inclusion Criteria:  Gestational age (GA) at birth 33+0 - 37+0 weeks Admitted to NICU Planned the heel-stick sampling within the scope of the NSTs Parents are able to read, write and speak Turkish  Exclusion Criteria:  With a postnatal age of 8 days or more Has contraindications for the administration of oral glucose (genetic, endocrine, metabolic diseases or neurological problems etc.) Has major congenital anomalies Has intubated or receiving a nCPAP Has received analgesics or sedatives for less than 24 hours before the procedure