infants had a condition that might influence their responses to pain, e.g., congenital anomalies or severe illnesses requiring treatment with antiepileptics, muscle relaxants, or analgesic drugs.

infants had a condition that might influence their responses to pain, e.g., congenital anomalies or severe illnesses requiring treatment with antiepileptics, muscle relaxants, or analgesic drugs and comparing the pain intensity with preterm infants who receive conventional care.

Inclusion Criteria:

• Preterm infants whose corrected gestational age from (32 - <37) weeks of pregnancy
• Preterm infants who do not experience any painful procedure for last 24 hours
• Preterm infants do not receive any sedation for last 24 hours

Exclusion Criteria:

• full-term infants whose corrected gestational age is >37 weeks
• extremely preterm (< 28 weeks)
• very preterm (28-<32 weeks)
• proven or suspected sepsis
• major congenital malformations
• all heart defect except neonatal Patent ductus arteriosus (PDA)
• necrotizing enterocolitis
• neurodevelopmental disability
• who receive respiratory support {Mechanical Ventilation, Continuous Positive Airway Pressure, or high-flow support
• indicated for surgery
• contraindication to oral sucrose
• Twins
• infants had a condition that might influence their responses to pain, e.g., congenital anomalies or severe illnesses requiring treatment with antiepileptics, muscle relaxants, or analgesic drugs