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  • Title: Thyroid function in patients with hyperemesis gravidarum.
    Author: Bouillon R, Naesens M, Van Assche FA, De Keyser L, De Moor P, Renaer M, De Vos P, De Roo M.
    Journal: Am J Obstet Gynecol; 1982 Aug 15; 143(8):922-6. PubMed ID: 7102767.
    Abstract:
    An increased free thyroxine (T4) index was observed in 73% of 33 consecutive pregnancies complicated by severe hyperemesis gravidarum. The free triiodothyronine (T3) index was increased in only four of 11 hyperthyroxinemic patients. In five hyperthyroxinemic patients tested, no increase in serum thyrotropin was observed after the injection of thyrotropin-releasing hormone (THR). Goiter, exophthalmos, or previous history of hyperthyroidism was absent in all patients. The thyroxinemia returned to normal in one to several weeks, whether or not it was treated with antithyroid drugs. The thyroid function during the period of hyperemesis had no influence on the subsequent rate of abortion or duration of pregnancy. A lower birth weight, however, was observed in children born to hyperthyroxinemic mothers. Hyperemesis gravidarum should be included in the differential diagnosis of elevations in free T4 index during pregnancy and included in the differential diagnosis of hyperthyroidism.
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