Question

A 30-year-old woman with established hypothyroidism becomes pregnant at 6 weeks. Her last TSH was 2.8 mU/L on levothyroxine 100 micrograms daily. What should be done now?

Accepted Answer

Increase levothyroxine dose by around 25-30% and recheck thyroid function in 4 weeks

Answer

Stop levothyroxine until TSH is rechecked

Answer

Reduce levothyroxine dose by 25%

Answer

Switch to liothyronine

Answer

No change until second trimester

Practice question

A 30-year-old woman with established hypothyroidism becomes pregnant at 6 weeks. Her last TSH was 2.8 mU/L on levothyroxine 100 micrograms daily. What should be done now?