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Hypothyroidism in Pregnancy.

Peter N Taylor1, John H Lazarus1

  • 1Thyroid Research Group, Systems Immunity Research Institute, Cardiff University School of Medicine, UHW, C2 Link Corridor, Heath Park, Cardiff CF14 4XN, UK.

Endocrinology and Metabolism Clinics of North America
|July 27, 2019
PubMed
Summary
This summary is machine-generated.

Thyroid hormone is crucial for healthy pregnancies and fetal development. While overt hypothyroidism requires treatment, the benefits of screening and treating borderline thyroid dysfunction during pregnancy remain debated.

Keywords:
HypothyroidismIodineLevothyroxinePregnancyScreeningTPO

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Area of Science:

  • Reproductive endocrinology
  • Maternal-fetal medicine
  • Thyroidology

Background:

  • Thyroid hormone is vital for fetal development and maternal health during pregnancy.
  • Pregnancy significantly impacts the maternal thyroid axis.
  • Overt hypothyroidism is linked to adverse obstetric and offspring outcomes, necessitating treatment.

Purpose of the Study:

  • To review the role of thyroid hormone in pregnancy.
  • To discuss the implications of overt and borderline thyroid dysfunction.
  • To examine the ongoing debate surrounding universal thyroid screening in pregnancy.

Main Methods:

  • Literature review of existing studies on thyroid function during pregnancy.
  • Analysis of obstetric and offspring outcomes related to maternal thyroid status.
  • Discussion of current clinical practices and screening controversies.

Main Results:

  • Overt hypothyroidism during pregnancy is associated with poor outcomes and requires management.
  • Borderline thyroid dysfunction is common and linked to adverse outcomes, but treatment benefits are uncertain.
  • Thyroid hormone replacement doses often need adjustment during pregnancy, with careful monitoring to avoid overreplacement.

Conclusions:

  • Maternal thyroid health is critical for successful pregnancy and fetal development.
  • The management of overt hypothyroidism is established, but optimal strategies for borderline dysfunction require further investigation.
  • Universal thyroid screening in pregnancy is a growing trend but remains a subject of ongoing discussion and research.