34-year-old woman is referred to the Endocrine Clinic with a history of thyrotoxicosis. At her first appointment she is found to have a smooth goitre, lid lag and bilateral exophthalmos with puffy eyelids and conjunctival injection. She wants to discuss the treatment of her thyroid problem as she is keen to become pregnant. What is the most likely treatment you would advise?
A. 18 months of carbimazole alone
B. 18 months of propyl thiouracil alone
C. A combination of anti-thyroid drugs and thyroxine
D. Radioactive iodine
E. Thyroidectomy