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  • Title: Cord blood iodothyronine and thyrotropin concentrations in newborns of mothers exposed to povidone iodine in the last trimester.
    Author: Robuschi G, Montermini M, Alboni A, Borciani E, Cersosimo G, Negrotti L, Gnudi A, Safran M, Braverman LE, Roti E.
    Journal: J Endocrinol Invest; 1987 Apr; 10(2):183-6. PubMed ID: 3584857.
    Abstract:
    In the present study, we have evaluated thyroid function in neonates at delivery and in their mothers who used vaginal povidone-iodine (PVP-I) during the last trimester of pregnancy. Newborns and their mothers without a history of iodine exposure, admitted to the same department and residing in the same geographical area served as controls. Maternal serum thyroxine (T4), triiodothyronine (T3), reverse triiodothyronine (rT3) and thyrotropin (TSH) concentrations at delivery were not significantly different between the two groups of pregnant women. Cord blood thyroid hormone concentrations in the newborns of iodine exposed mothers were not significantly different from those in control newborns. In contrast, cord blood TSH concentrations in the neonates of mothers exposed to PVP-I during the last trimester of pregnancy were significantly higher than values in control neonates (p less than 0.05). These data confirm that the fetal thyroid gland, even in the last trimester of pregnancy, does not adapt completely to the inhibitory action of iodine on thyroid hormone synthesis and/or release.
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