A 32-year-old woman, G1P0, at 8 weeks gestation, has a known history of hypothyroidism managed with levothyroxine. Her thyroid-stimulating hormone (TSH) level before pregnancy was well-controlled at 2.0 mIU/L. She asks about potential adjustments to her medication during pregnancy. What is the most appropriate recommendation regarding her levothyroxine dosage?
✓ Correct Answer: Option C
Thyroid hormone requirements increase significantly during pregnancy (often by 25-50%) due to increased thyroid-binding globulin and fetal demand. TSH should be monitored closely (every 4-6 weeks) and the dose adjusted to maintain euthyroidism.