1. Incidence of antithyroid peroxidase antibodies in women who are euthyroid; in those with isolated maternal hypothyroxinemia (IMH), defined by a normal serum thyroid-stimulating hormone (TSH) value and serum free thyroxine (T4) level < 0.86 ng/dL; in those with subclinical hypothyroidism (SH), defined as serum TSH value ≥ 3.0 mU/L with a normal reference range serum free T4 level; and in those with overt hypothyroidism defined by an abnormally high serum TSH value with an abnormally low serum free T4 level. (Data from Casey and associates, 2007.)
Source: Chapter 53. Thyroid and Other Endocrine Disorders, Williams Obstetrics, 23e
Citation: Cunningham F, Leveno KJ, Bloom SL, Hauth JC, Rouse DJ, Spong CY. Williams Obstetrics, 23e; 2010 Available at: Accessed: October 23, 2017
Copyright © 2017 McGraw-Hill Education. All rights reserved