Please confirm topic selection

Are you sure you want to trigger topic in your Anconeus AI algorithm?

Please confirm action

You are done for today with this topic.

Would you like to start learning session with this topic items scheduled for future?

Review Question - QID 214475

In scope icon M 2 A
QID 214475 (Type "214475" in App Search)
A 33-year-old woman presents to her obstetrician 30 weeks into her pregnancy. On her routine labs, her total T4 levels are found to have increased and are now well above the reference range. Her thyroid-stimulating hormone level was low-normal, and her free T4 is normal. She denies any symptoms, including palpitations, weight loss, or anxiety. She does have occasional shortness of breath and fatigue. On exam, her temperature is 98.3°F (36.8°C), blood pressure is 128/78 mmHg, pulse is 76/min, and respirations are 14/min. Alterations in levels of which of the following likely resulted in her abnormal lab findings?