Korean J Obstet Gynecol.  2010 Sep;53(9):795-803. 10.5468/kjog.2010.53.9.795.

Perinatal outcome of pregnancy with hyperthyroidism

Affiliations
  • 1Department of Obstetrics and Gynecology, The Catholic University of Korea School of Medicine, Seoul, Korea. jcshin@catholic.ac.kr

Abstract


OBJECTIVE
To evaluate the maternal and neonatal outcomes of pregnancies complicated with hyperthyroidism, according to the maternal treatment and thyroid function status during pregnancy.
METHODS
This retrospective study was conducted on women complicated by hyperthyroidism who delivered between January 2000 and March 2010, at Catholic University Medical Center. The baseline characteristics as well as maternal and fetal outcomes were analyzed and compared according to maternal antithyroid medication and thyroid function status.
RESULTS
Among 163 pregnant women complicated with hyperthyroidism, 103 women received antithyroid medication and 109 women showed euthyroid status during pregnancy. The mean gestational age and fetal birth weight at delivery were 38.2+/-2.9 weeks and 2.99+/-0.64 kg. There was no statistical difference in maternal complications between the medication group (n=103) and the non-medication group (n=59), while neonatal thyroid dysfunction including transient hypothyroidism was significantly higher in the medication group than the non-medication group (58% vs 24.5%, P<0.0001). The incidence of admission due to hyperemesis and neonatal thyroid dysfunction were significantly higher in the thyroid dysfunction group than the euthyroid group (21.7% vs 4.6%, P=0.0146; 66.7% vs 39.4%, P=0.0223, respectively).
CONCLUSION
Maternal antithyroid medication as well as thyroid dysfunction during pregnancy could indicate the careful fetal thyroid monitoring to prevent neonatal thyroid dysfunction.

Keyword

Pregnancy; Hyperthyroidism

MeSH Terms

Academic Medical Centers
Birth Weight
Female
Gestational Age
Humans
Hyperthyroidism
Hypothyroidism
Incidence
Pregnancy
Pregnant Women
Retrospective Studies
Thyroid Gland
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