22nd May 2025

An anxious 23-year-old woman who is 14 weeks pregnant presents to her GP to discuss thyrotoxicosis.

An anxious 23-year-old woman who is 14 weeks pregnant presents to her GP to discuss thyrotoxicosis. She has a family history of Grave’s disease but does not report any symptoms associated with thyrotoxicosis.

Which of the following tests will give an accurate indication of thyroid hormone levels in this patient?

Select the SINGLE most appropriate option from the list below. Select ONE option only.