Obstetrics and gynecology · 1994
Low birth weight and preeclampsia in pregnancies complicated by hyperthyroidism.
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Millar L K, Wing D A, Leung A S, Koonings P P, Montoro M N, Mestman J H
Аннотация
OBJECTIVE: To determine whether control of hyperthyroidism during pregnancy reduces the risk of low birth weight infants and severe preeclampsia.
METHODS: Labor, delivery, and postpartum records of 181 hyperthyroid women were reviewed for maternal and fetal outcomes. Subjects were separated into three groups based on their thyroid status: controlled (n = 34), including women who were euthyroid at presentation and delivery; controlled during pregnancy (n = 90), including women who were hyperthyroid at presentation and euthyroid at delivery; and uncontrolled (n = 57), including women who were hyperthyroid at presentation and delivery.
RESULTS: The risk of low birth weight infants was 0.74 (95% confidence interval [CI] 0.18-3.08) among controlled women, 2.36 (95% CI 1.36-4.12) among women who were controlled during pregnancy, and 9.24 (95% CI 5.47-15.6) among women who were uncontrolled during pregnancy compared to the incidence among nonhyperthyroid mothers. The risk of severe preeclampsia was significantly higher (odds ratio 4.74, 95% CI 1.14-19.7) among uncontrolled women compared with those who were controlled during their pregnancies. Elevated TSH-receptor antibody levels were not related to preeclampsia. Maternal thioamide therapy did not adversely affect neonatal outcomes.
CONCLUSION: Lack of control of hyperthyroidism significantly increases the risk of low birth weight infants and severe preeclampsia.
METHODS: Labor, delivery, and postpartum records of 181 hyperthyroid women were reviewed for maternal and fetal outcomes. Subjects were separated into three groups based on their thyroid status: controlled (n = 34), including women who were euthyroid at presentation and delivery; controlled during pregnancy (n = 90), including women who were hyperthyroid at presentation and euthyroid at delivery; and uncontrolled (n = 57), including women who were hyperthyroid at presentation and delivery.
RESULTS: The risk of low birth weight infants was 0.74 (95% confidence interval [CI] 0.18-3.08) among controlled women, 2.36 (95% CI 1.36-4.12) among women who were controlled during pregnancy, and 9.24 (95% CI 5.47-15.6) among women who were uncontrolled during pregnancy compared to the incidence among nonhyperthyroid mothers. The risk of severe preeclampsia was significantly higher (odds ratio 4.74, 95% CI 1.14-19.7) among uncontrolled women compared with those who were controlled during their pregnancies. Elevated TSH-receptor antibody levels were not related to preeclampsia. Maternal thioamide therapy did not adversely affect neonatal outcomes.
CONCLUSION: Lack of control of hyperthyroidism significantly increases the risk of low birth weight infants and severe preeclampsia.