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Pregnancy outcomes and relationship to treatment adequacy in women treated early for congenital hypothyroidism: a longitudinal population-based study. | LitMetric

Pregnancy outcomes and relationship to treatment adequacy in women treated early for congenital hypothyroidism: a longitudinal population-based study.

J Clin Endocrinol Metab

Assistance Publique-Hôpitaux de Paris (J.L., S.d.S., E.E.), Hôpital Robert Debré, Service d'Endocrinologie Diabétologie Pédiatrique, Centre de Référence des Maladies Endocriniennes Rares de la Croissance, F-75019 Paris, France; Université Paris Diderot (J.L.), Sorbonne Paris Cité, F-75019 Paris, France; Institut National de la Santé et de la Recherche Médicale (J.L.), U1141 Paris, France; Clinical Epidemiology and Research Unit (B.L.), Hôpital Beaujon, Assistance Publique-Hôpitaux de Paris, 75019 Paris, France; Institut National de la Santé et de la Recherche Médicale (B.L.), UMR S953, Epidemiological Research on Perinatal Health and Women's and Children's Health, 75019 Paris, France.

Published: March 2015

AI Article Synopsis

  • Untreated hypothyroidism can lead to serious complications during pregnancy, but the effects in women treated early for congenital hypothyroidism (CH) are less understood.
  • This study analyzed the pregnancy outcomes of 1748 women with CH using a population-based registry, focusing on pregnancies post-22 weeks gestation.
  • The findings indicated that CH is linked to higher risks of conditions like gestational hypertension and preterm delivery, and that managing thyroid hormone levels, especially in early pregnancy, is crucial for better outcomes.

Article Abstract

Context: Untreated hypothyroidism is associated with a higher risk of adverse obstetric and neonatal outcomes. Pregnancy complications have yet to be evaluated in patients treated early for congenital hypothyroidism (CH).

Objective: This study aimed to investigate pregnancy outcomes and their determinants in a population-based registry of young adult women with CH.

Setting And Design: In total, 1748 subjects were diagnosed with CH in the first 10 years after the introduction of neonatal screening in France; 1158 of these subjects completed a questionnaire on fecundity at a mean age of 25.3 years. We analyzed all declared singleton pregnancies ending after greater than 22 weeks of gestation before the initial survey (n = 207 pregnancies) and in the 3 years following the initial survey (prospective study, n = 174 pregnancies). The reference group comprised 7245 subjects from the French National Perinatal Survey.

Main Outcome Measures: Pregnancy outcomes. Serum TSH concentrations and thyroid hormone requirements.

Results: In both the overall and prospective analyses, CH was associated with gestational hypertension, emergency cesarean delivery, induced labor for vaginal delivery, and prematurity. For the prospective population with CH, the adjusted odds ratios (aOR) (95% confidence interval [CI]) were 2.19 (1.26-3.81), 1.88 (1.17-3.02), 1.58 (1.12-2.24), and 1.85 (1.06-3.25), respectively. TSH concentrations at least 10 mIU/l during the first 3 or 6 months of pregnancy were associated with a higher risk of preterm delivery (aOR, 5.6; 95% CI, 1.6-20.0) and fetal macrosomia (aOR, 4.5; 95% CI, 1.03-20.1), respectively, whereas no such relationship was observed for TSH concentrations of 5.0-9.9 mIU/l.

Conclusion: CH may result in adverse pregnancy outcomes. These nationwide data suggest that better thyroid disease management is required, particularly during the first two trimesters of pregnancy, together with vigilant monitoring.

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Source
http://dx.doi.org/10.1210/jc.2014-3049DOI Listing

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