Perinatal outcome of pregnancy with hyperthyroidism.

Ko, Hyun Sun; Jang, Dong Gyu; Shin, Jae Eun; Kim, Yeon Hee; Park, In Yang; Shin, Jong Chul

doi:2010.53.9.795

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Obstet Gynecol Sci > Volume 53(9); 2010 > Article

Original Article

Korean Journal of Obstetrics & Gynecology 2010;53(9):795-803.
Published online: September 1, 2010
DOI: https://doi.org/10.5468/kjog.2010.53.9.795

Perinatal outcome of pregnancy with hyperthyroidism.

Hyun Sun Ko, Dong Gyu Jang, Jae Eun Shin, Yeon Hee Kim, In Yang Park, Jong Chul Shin

Department 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.

Keywords: Pregnancy; Hyperthyroidism

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