Endocrine Abstracts

Hypothyroidism in pregnancy is generally considered harmful. However, the definition of hypothyroid during pregnancy remains controversial. Measurements of maternal serum TSH have traditionally been used to define hypothyroidism, with values >2.5 mIU/l generally warranting treatment. However, recent data have suggested that the ‘normal’ reference range for serum TSH in healthy pregnant women varies by region as well as by ethnicity. Importantly, changing the uppe...