Question

A 29-year-old woman with established primary hypothyroidism becomes pregnant at 6 weeks. She is clinically well on levothyroxine 100 micrograms daily. TSH at booking is 2.8 mIU/L. What change is recommended now?

Accepted Answer

Increase levothyroxine dose by ~25-30% immediately

Answer

Stop levothyroxine until 12 weeks

Answer

Reduce levothyroxine dose by 25%

Answer

Switch to liothyronine

Answer

No change until third trimester

Practice question

A 29-year-old woman with established primary hypothyroidism becomes pregnant at 6 weeks. She is clinically well on levothyroxine 100 micrograms daily. TSH at booking is 2.8 mIU/L. What change is recommended now?