Question

A 32-year-old woman with established hypothyroidism discovers she is 8 weeks pregnant. TFTs last month were stable. What should you advise now?

Accepted Answer

Increase levothyroxine dose (e.g., by 25-50 micrograms or 2 extra tablets/week) and check TFTs in 4 weeks

Answer

Stop levothyroxine until 12 weeks

Answer

Reduce levothyroxine to avoid hyperthyroxinaemia

Answer

Switch to liothyronine

Answer

No changes until postpartum

Practice question

A 32-year-old woman with established hypothyroidism discovers she is 8 weeks pregnant. TFTs last month were stable. What should you advise now?