Thyroid Dysfunction in PregnancyHyperthyroidism During Pregnancy: A Clinical ApproachCUFF, RYAN D. MD Author Information Department of Obstetrics/Gynecology, Division of Maternal-Fetal Medicine, Medical University of South Carolina, Charleston, South Carolina The author declares that there is nothing to disclose. Correspondence: Ryan D. Cuff, MD, Suite 634, MSC 619, Charleston, SC. E-mail: [email protected] Clinical Obstetrics and Gynecology: June 2019 - Volume 62 - Issue 2 - p 320-329 doi: 10.1097/GRF.0000000000000435 Buy Metrics Abstract Hyperthyroidism is relatively uncommon during pregnancy. However, those caring for pregnant patients should be versed in the evaluation and management of hyperthyroidism, as there are potential maternal and fetal implications that are related to the disease and to treatment. The differential diagnosis of hyperthyroidism includes clinical and subclinical entities, as well as transient laboratory findings that are related to the pregnancy itself. The clinical management, including the indications for the use of thioamide or antithyroid medications, will be discussed in the context of pregnancy. Finally, considerations for the management of the postpartum and/or breastfeeding patient with hyperthyroidism will be reviewed. Copyright © 2019 Wolters Kluwer Health, Inc. All rights reserved.