Can Maternal Factors Impact Neonatal Stress and Pain Responses?

Abstract

Background, Objectives: Studies have demonstrated that neo-nates exhibit cortical responses to noxious stimuli, express clear physiological stress reactions. Major challenge – effective pain assessment. There is lack of studies investigating maternal fac-tors influencing neonatal stress and pain responses. This study aimed to identify these factors. Methods: We conducted a prospective quantitative study at the Lithuanian University of Health Sciences Kaunas Clinics (Dec2020–Nov 2021). Term and preterm neonates admitted to the Neonatology Department/NICU were included. Exclusion criteria: neonate endocrine, CNS disorders, treatment with glucocorticoids or analgesics, and dehydration. Data collected: neonate's vitals, demographics, PIPP score, mothers’ medical history. Newborn salivary cortisol and melatonin were measured via ELISA before and 30 minutes after venipuncture or heel prick. Statistical analysis performed with SPSS 29.0. p value < 0.05 considered significant. Results: 98 newborns included in the study, 63.3% born on term. 68.4% of birth – natural. Half of women < 30 y.o. (median29 years, IQR26-33). 73.5% had pathology during pregnancy, 62.2% had medical anesthesia/pain management during labor. Higher melatonin in newborns born via CPO post NICU procedure(p = 0.028). Newborns from mothers who had any pathology during pregnancy were 12.6x more likely to have higher cortisol before heel-lance procedure (p = 0.021). The method of delivery negatively correlated with pre-procedure cortisol concentration(p = 0.035, p = 0.068). Maternal harmful habits increase melatonin concentration 6.319x after the heel-lance prick. Pain relief during labor and harmful maternal habits were associated with difference in melatonin concentration before and after the heel-lance procedure (p = 0.005, p = 0.002). Neonates born via CPO had higher melatonin after NICU procedure (p = 0.028). Conclusion: We observed that neonatal stress and pain responses are significantly influenced by maternal factors, including maternal health, delivery method, and maternal behaviors.