Abstract
Thyroid dysfunction is relatively common in pregnancy. The American Thyroid Association (ATA) published its most recent guidelines regarding the management of thyroid disorders in pregnancy in 2017. The American College of Obstetricians and Gynecologists (ACOG) has recently published an updated practice bulletin for thyroid disease in pregnancy that supersedes its previous guidance published in 2015. A comparison of the similarities and differences between the clinical guidelines from the ATA and ACOG can serve to highlight areas of uncertainty where additional studies are needed and may also demonstrate areas where endocrinologists and obstetricians may elect differing approaches to clinical care. The ACOG and ATA guidelines recommend similar approaches to the interpretation of thyroid function testing during gestation and to the management of thyroid cancer, thyroid nodules, gestational thyrotoxicosis, and postpartum thyroiditis Both strongly recommend levothyroxine (L-T 4 ) treatment for overtly hypothyroid pregnant women, and both recommend against the use of T 3 -containing thyroid hormone preparations when treating hypothyroidism in pregnancy.
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