Sağlikli Term ve Preterm Yenidoğanlarda Tiroid Fonksiyonlarinin Karşilaştirilmasi Comparison of Thyroid Functions in Healthy Term and Preterm Neonates

Background: We aimed to investigate thyroid functions and to compare the thyroid hormone levels in healthy preterm and term infants. Methods: Thyroid stimulating hormone (TSH) and free thyroxine (FT4) levels determined in healthy term (≥37 gestational weeks) and preterm (<37 gestational weeks) neonates on the postnatal third day were retrospectively evaluated. Infants whose mothers with thyroid disease, treated in neonatal intensive care unit for diseases including sepsis, respiratory distress, etc and <31 weeks preterms were excluded.